125521667 has 2 divisors, whose sum is σ = 125521668. Its totient is φ = 125521666.

The previous prime is 125521637. The next prime is 125521673. The reversal of 125521667 is 766125521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125521667 - 2⁸ = 125521411 is a prime.

It is not a weakly prime, because it can be changed into another prime (125521637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62760833 + 62760834.

It is an arithmetic number, because the mean of its divisors is an integer number (62760834).

Almost surely, 2^125521667 is an apocalyptic number.

125521667 is a deficient number, since it is larger than the sum of its proper divisors (1).

125521667 is an equidigital number, since it uses as much as digits as its factorization.

125521667 is an evil number, because the sum of its binary digits is even.

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

The square root of 125521667 is about 11203.6452550052. The cubic root of 125521667 is about 500.6945906409.

It can be divided in two parts, 1255 and 21667, that added together give a palindrome (22922).

The spelling of 125521667 in words is "one hundred twenty-five million, five hundred twenty-one thousand, six hundred sixty-seven".