125520213 has 48 divisors (see below), whose sum is σ = 220758720. Its totient is φ = 62705664.

The previous prime is 125520211. The next prime is 125520247. The reversal of 125520213 is 312025521.

It is not a de Polignac number, because 125520213 - 2¹ = 125520211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 125520213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125520211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34581 + ... + 38037.

It is an arithmetic number, because the mean of its divisors is an integer number (4599140).

Almost surely, 2^125520213 is an apocalyptic number.

125520213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

125520213 is a deficient number, since it is larger than the sum of its proper divisors (95238507).

125520213 is a wasteful number, since it uses less digits than its factorization.

125520213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506 (or 3499 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 125520213 is about 11203.5803652225. The cubic root of 125520213 is about 500.6926573419.

125520213 divided by its sum of digits (21) gives a triangular number (5977153 = T₃₄₅₇).

Adding to 125520213 its reverse (312025521), we get a palindrome (437545734).

The spelling of 125520213 in words is "one hundred twenty-five million, five hundred twenty thousand, two hundred thirteen".