125405213 has 4 divisors (see below), whose sum is σ = 125506080. Its totient is φ = 125304348.

The previous prime is 125405207. The next prime is 125405219. The reversal of 125405213 is 312504521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (125405207) and next prime (125405219).

It is a cyclic number.

It is not a de Polignac number, because 125405213 - 2¹⁴ = 125388829 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 (125405219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48545 + ... + 51062.

It is an arithmetic number, because the mean of its divisors is an integer number (31376520).

Almost surely, 2^125405213 is an apocalyptic number.

It is an amenable number.

125405213 is a deficient number, since it is larger than the sum of its proper divisors (100867).

125405213 is an equidigital number, since it uses as much as digits as its factorization.

125405213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100866.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 125405213 is about 11198.4469012448. The cubic root of 125405213 is about 500.5397012355.

Adding to 125405213 its reverse (312504521), we get a palindrome (437909734).

The spelling of 125405213 in words is "one hundred twenty-five million, four hundred five thousand, two hundred thirteen".