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122430155 = 531777243
BaseRepresentation
bin1110100110000…
…10001011001011
322112101002121012
413103002023023
5222320231110
620052034135
73014432141
oct723021313
9275332535
10122430155
1163121651
123500294b
131c4980a3
141238d591
15ab35905
hex74c22cb

122430155 has 8 divisors (see below), whose sum is σ = 147381552. Its totient is φ = 97633888.

The previous prime is 122430137. The next prime is 122430157. The reversal of 122430155 is 551034221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-122430155 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122430155.

It is not an unprimeable number, because it can be changed into a prime (122430157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37037 + ... + 40206.

It is an arithmetic number, because the mean of its divisors is an integer number (18422694).

Almost surely, 2122430155 is an apocalyptic number.

122430155 is a deficient number, since it is larger than the sum of its proper divisors (24951397).

122430155 is an equidigital number, since it uses as much as digits as its factorization.

122430155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77565.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 122430155 is about 11064.8160852316. The cubic root of 122430155 is about 496.5497868197.

Adding to 122430155 its reverse (551034221), we get a palindrome (673464376).

The spelling of 122430155 in words is "one hundred twenty-two million, four hundred thirty thousand, one hundred fifty-five".

Divisors: 1 5 317 1585 77243 386215 24486031 122430155