1265664106 has 32 divisors (see below), whose sum is σ = 2266174080. Its totient is φ = 518809536.

The previous prime is 1265664097. The next prime is 1265664133. The reversal of 1265664106 is 6014665621.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 9856 + ... + 51268.

It is an arithmetic number, because the mean of its divisors is an integer number (70817940).

Almost surely, 2^1265664106 is an apocalyptic number.

1265664106 is a deficient number, since it is larger than the sum of its proper divisors (1000509974).

1265664106 is a wasteful number, since it uses less digits than its factorization.

1265664106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41518.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1265664106 is about 35576.1732905606. The cubic root of 1265664106 is about 1081.6983184774.

The spelling of 1265664106 in words is "one billion, two hundred sixty-five million, six hundred sixty-four thousand, one hundred six".