155245120 has 56 divisors (see below), whose sum is σ = 382447800. Its totient is φ = 59953152.

The previous prime is 155245049. The next prime is 155245127. The reversal of 155245120 is 21542551.

It can be written as a sum of positive squares in 4 ways, for example, as 24920064 + 130325056 = 4992^2 + 11416^2 .

It is not an unprimeable number, because it can be changed into a prime (155245127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916 + ... + 17644.

It is an arithmetic number, because the mean of its divisors is an integer number (6829425).

Almost surely, 2^155245120 is an apocalyptic number.

155245120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155245120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191223900).

155245120 is an abundant number, since it is smaller than the sum of its proper divisors (227202680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155245120 is a wasteful number, since it uses less digits than its factorization.

155245120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16775 (or 16765 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 155245120 is about 12459.7399651839. The cubic root of 155245120 is about 537.4515492653.

Adding to 155245120 its reverse (21542551), we get a palindrome (176787671).

The spelling of 155245120 in words is "one hundred fifty-five million, two hundred forty-five thousand, one hundred twenty".