1220601345 has 8 divisors (see below), whose sum is σ = 1952962176. Its totient is φ = 650987376.

The previous prime is 1220601341. The next prime is 1220601383. The reversal of 1220601345 is 5431060221.

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

It is not a de Polignac number, because 1220601345 - 2² = 1220601341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220601341) 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, 40686697 + ... + 40686726.

It is an arithmetic number, because the mean of its divisors is an integer number (244120272).

Almost surely, 2^1220601345 is an apocalyptic number.

1220601345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220601345 is a deficient number, since it is larger than the sum of its proper divisors (732360831).

1220601345 is an equidigital number, since it uses as much as digits as its factorization.

1220601345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81373431.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1220601345 is about 34937.1055612797. The cubic root of 1220601345 is about 1068.7052627900.

Adding to 1220601345 its reverse (5431060221), we get a palindrome (6651661566).

The spelling of 1220601345 in words is "one billion, two hundred twenty million, six hundred one thousand, three hundred forty-five".