1156430265 has 16 divisors (see below), whose sum is σ = 1856132928. Its totient is φ = 614814656.

The previous prime is 1156430207. The next prime is 1156430279. The reversal of 1156430265 is 5620346511.

It is a cyclic number.

It is not a de Polignac number, because 1156430265 - 2⁶ = 1156430201 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116847 + ... + 126356.

It is an arithmetic number, because the mean of its divisors is an integer number (116008308).

Almost surely, 2^1156430265 is an apocalyptic number.

1156430265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156430265 is a deficient number, since it is larger than the sum of its proper divisors (699702663).

1156430265 is a wasteful number, since it uses less digits than its factorization.

1156430265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243528.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1156430265 is about 34006.3268378106. The cubic root of 1156430265 is about 1049.6386557075.

Adding to 1156430265 its reverse (5620346511), we get a palindrome (6776776776).

The spelling of 1156430265 in words is "one billion, one hundred fifty-six million, four hundred thirty thousand, two hundred sixty-five".