125142013 has 4 divisors (see below), whose sum is σ = 126357088. Its totient is φ = 123926940.

The previous prime is 125142007. The next prime is 125142019. The reversal of 125142013 is 310241521.

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 (125142007) and next prime (125142019).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125142013 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 (125142019) 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, 607383 + ... + 607588.

It is an arithmetic number, because the mean of its divisors is an integer number (31589272).

Almost surely, 2^125142013 is an apocalyptic number.

It is an amenable number.

125142013 is a deficient number, since it is larger than the sum of its proper divisors (1215075).

125142013 is a wasteful number, since it uses less digits than its factorization.

125142013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215074.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 125142013 is about 11186.6890991035. The cubic root of 125142013 is about 500.1892790045.

Adding to 125142013 its reverse (310241521), we get a palindrome (435383534).

It can be divided in two parts, 1251 and 42013, that added together give a square (43264 = 208²).

The spelling of 125142013 in words is "one hundred twenty-five million, one hundred forty-two thousand, thirteen".