1249772065 has 16 divisors (see below), whose sum is σ = 1560549888. Its totient is φ = 960072256.

The previous prime is 1249772053. The next prime is 1249772071. The reversal of 1249772065 is 5602779421.

It is a cyclic number.

It is not a de Polignac number, because 1249772065 - 2⁷ = 1249771937 is a prime.

It is a Duffinian 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, 37717 + ... + 62626.

It is an arithmetic number, because the mean of its divisors is an integer number (97534368).

Almost surely, 2^1249772065 is an apocalyptic number.

It is an amenable number.

1249772065 is a deficient number, since it is larger than the sum of its proper divisors (310777823).

1249772065 is a wasteful number, since it uses less digits than its factorization.

1249772065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100448.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 1249772065 is about 35352.1154246814. The cubic root of 1249772065 is about 1077.1518648929.

The spelling of 1249772065 in words is "one billion, two hundred forty-nine million, seven hundred seventy-two thousand, sixty-five".