1165110401 has 32 divisors (see below), whose sum is σ = 1470701568. Its totient is φ = 898413120.

The previous prime is 1165110391. The next prime is 1165110433. The reversal of 1165110401 is 1040115611.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1165110401 - 2⁶ = 1165110337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165110461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1415276 + ... + 1416098.

It is an arithmetic number, because the mean of its divisors is an integer number (45959424).

Almost surely, 2^1165110401 is an apocalyptic number.

It is an amenable number.

1165110401 is a deficient number, since it is larger than the sum of its proper divisors (305591167).

1165110401 is a wasteful number, since it uses less digits than its factorization.

1165110401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1165110401 is about 34133.7135541974. The cubic root of 1165110401 is about 1052.2582992439.

The spelling of 1165110401 in words is "one billion, one hundred sixty-five million, one hundred ten thousand, four hundred one".