125031155 has 4 divisors (see below), whose sum is σ = 150037392. Its totient is φ = 100024920.

The previous prime is 125031131. The next prime is 125031161. The reversal of 125031155 is 551130521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551130521 = 151 ⋅3649871.

It is not a de Polignac number, because 125031155 - 2¹⁰ = 125030131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125031155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12503111 + ... + 12503120.

It is an arithmetic number, because the mean of its divisors is an integer number (37509348).

Almost surely, 2^125031155 is an apocalyptic number.

125031155 is a deficient number, since it is larger than the sum of its proper divisors (25006237).

125031155 is an equidigital number, since it uses as much as digits as its factorization.

125031155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25006236.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 125031155 is about 11181.7330946504. The cubic root of 125031155 is about 500.0415365493.

Adding to 125031155 its reverse (551130521), we get a palindrome (676161676).

The spelling of 125031155 in words is "one hundred twenty-five million, thirty-one thousand, one hundred fifty-five".