125521371 has 6 divisors (see below), whose sum is σ = 181308660. Its totient is φ = 83680908.

The previous prime is 125521369. The next prime is 125521381. The reversal of 125521371 is 173125521.

It is not a de Polignac number, because 125521371 - 2¹ = 125521369 is a prime.

It is a super-2 number, since 2×125521371² = 31511229155439282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125521301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6973401 + ... + 6973418.

It is an arithmetic number, because the mean of its divisors is an integer number (30218110).

Almost surely, 2^125521371 is an apocalyptic number.

125521371 is a deficient number, since it is larger than the sum of its proper divisors (55787289).

125521371 is a wasteful number, since it uses less digits than its factorization.

125521371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946825 (or 13946822 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 125521371 is about 11203.6320450111. The cubic root of 125521371 is about 500.6941970681.

Adding to 125521371 its reverse (173125521), we get a palindrome (298646892).

The spelling of 125521371 in words is "one hundred twenty-five million, five hundred twenty-one thousand, three hundred seventy-one".