70131765 has 32 divisors (see below), whose sum is σ = 126369792. Its totient is φ = 32904000.

The previous prime is 70131751. The next prime is 70131769. The reversal of 70131765 is 56713107.

It is not a de Polignac number, because 70131765 - 2⁶ = 70131701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70131769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1741 + ... + 11970.

It is an arithmetic number, because the mean of its divisors is an integer number (3949056).

Almost surely, 2^70131765 is an apocalyptic number.

It is an amenable number.

70131765 is a deficient number, since it is larger than the sum of its proper divisors (56238027).

70131765 is a wasteful number, since it uses less digits than its factorization.

70131765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13761.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 70131765 is about 8374.4710280710. The cubic root of 70131765 is about 412.3869589242.

It can be divided in two parts, 7013 and 1765, that added together give a palindrome (8778).

The spelling of 70131765 in words is "seventy million, one hundred thirty-one thousand, seven hundred sixty-five".