125018031 has 4 divisors (see below), whose sum is σ = 166690712. Its totient is φ = 83345352.

The previous prime is 125018021. The next prime is 125018057. The reversal of 125018031 is 130810521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130810521 = 3 ⋅43603507.

It is not a de Polignac number, because 125018031 - 2⁵ = 125017999 is a prime.

It is a super-2 number, since 2×125018031² = 31259016150233922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125017989 and 125018007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125018011) 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, 20836336 + ... + 20836341.

It is an arithmetic number, because the mean of its divisors is an integer number (41672678).

Almost surely, 2^125018031 is an apocalyptic number.

125018031 is a deficient number, since it is larger than the sum of its proper divisors (41672681).

125018031 is an equidigital number, since it uses as much as digits as its factorization.

125018031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41672680.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 125018031 is about 11181.1462292557. The cubic root of 125018031 is about 500.0240401775.

Adding to 125018031 its reverse (130810521), we get a palindrome (255828552).

The spelling of 125018031 in words is "one hundred twenty-five million, eighteen thousand, thirty-one".