1265707641 has 16 divisors (see below), whose sum is σ = 1921075200. Its totient is φ = 733743120.

The previous prime is 1265707631. The next prime is 1265707669. The reversal of 1265707641 is 1467075621.

It is not a de Polignac number, because 1265707641 - 2⁵ = 1265707609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265707641.

It is not an unprimeable number, because it can be changed into a prime (1265707621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833041 + ... + 834558.

It is an arithmetic number, because the mean of its divisors is an integer number (120067200).

Almost surely, 2^1265707641 is an apocalyptic number.

1265707641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1265707641 is a deficient number, since it is larger than the sum of its proper divisors (655367559).

1265707641 is a wasteful number, since it uses less digits than its factorization.

1265707641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667636.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 1265707641 is about 35576.7851414374. The cubic root of 1265707641 is about 1081.7107207138.

The spelling of 1265707641 in words is "one billion, two hundred sixty-five million, seven hundred seven thousand, six hundred forty-one".