1165400425 has 24 divisors (see below), whose sum is σ = 1678628672. Its totient is φ = 786024000.

The previous prime is 1165400407. The next prime is 1165400437. The reversal of 1165400425 is 5240045611.

It is not a de Polignac number, because 1165400425 - 2⁵ = 1165400393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165400393 and 1165400402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43911 + ... + 65260.

Almost surely, 2^1165400425 is an apocalyptic number.

It is an amenable number.

1165400425 is a deficient number, since it is larger than the sum of its proper divisors (513228247).

1165400425 is a wasteful number, since it uses less digits than its factorization.

1165400425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109249 (or 109244 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1165400425 is about 34137.9616409650. The cubic root of 1165400425 is about 1052.3456027995.

It can be divided in two parts, 116 and 5400425, that added together give a triangular number (5400541 = T₃₂₈₆).

The spelling of 1165400425 in words is "one billion, one hundred sixty-five million, four hundred thousand, four hundred twenty-five".