125521631270 has 32 divisors (see below), whose sum is σ = 258341997888. Its totient is φ = 43014976128.

The previous prime is 125521631269. The next prime is 125521631297. The reversal of 125521631270 is 72136125521.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 125521631270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293009 + ... + 580428.

It is an arithmetic number, because the mean of its divisors is an integer number (8073187434).

Almost surely, 2^125521631270 is an apocalyptic number.

125521631270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125521631270 is an abundant number, since it is smaller than the sum of its proper divisors (132820366618).

125521631270 is a wasteful number, since it uses less digits than its factorization.

125521631270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875504.

The product of its (nonzero) digits is 25200, while the sum is 35.

Adding to 125521631270 its reverse (72136125521), we get a palindrome (197657756791).

The spelling of 125521631270 in words is "one hundred twenty-five billion, five hundred twenty-one million, six hundred thirty-one thousand, two hundred seventy".