1345415561 has 16 divisors (see below), whose sum is σ = 1585618944. Its totient is φ = 1117690704.

The previous prime is 1345415557. The next prime is 1345415633. The reversal of 1345415561 is 1655145431.

It is a cyclic number.

It is not a de Polignac number, because 1345415561 - 2² = 1345415557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1345445561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14036 + ... + 53738.

It is an arithmetic number, because the mean of its divisors is an integer number (99101184).

Almost surely, 2^1345415561 is an apocalyptic number.

It is an amenable number.

1345415561 is a deficient number, since it is larger than the sum of its proper divisors (240203383).

1345415561 is a wasteful number, since it uses less digits than its factorization.

1345415561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39860.

The product of its digits is 36000, while the sum is 35.

The square root of 1345415561 is about 36679.9067746907. The cubic root of 1345415561 is about 1103.9569776105.

The spelling of 1345415561 in words is "one billion, three hundred forty-five million, four hundred fifteen thousand, five hundred sixty-one".