125251213 has 4 divisors (see below), whose sum is σ = 126658620. Its totient is φ = 123843808.

The previous prime is 125251177. The next prime is 125251219. The reversal of 125251213 is 312152521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31606884 + 93644329 = 5622^2 + 9677^2 .

It is a cyclic number.

It is not a de Polignac number, because 125251213 - 2¹³ = 125243021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125251219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 703570 + ... + 703747.

It is an arithmetic number, because the mean of its divisors is an integer number (31664655).

Almost surely, 2^125251213 is an apocalyptic number.

It is an amenable number.

125251213 is a deficient number, since it is larger than the sum of its proper divisors (1407407).

125251213 is an equidigital number, since it uses as much as digits as its factorization.

125251213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407406.

The product of its digits is 600, while the sum is 22.

The square root of 125251213 is about 11191.5688355118. The cubic root of 125251213 is about 500.3347265330.

The spelling of 125251213 in words is "one hundred twenty-five million, two hundred fifty-one thousand, two hundred thirteen".