125381051 has 4 divisors (see below), whose sum is σ = 125425704. Its totient is φ = 125336400.

The previous prime is 125381041. The next prime is 125381059. The reversal of 125381051 is 150183521.

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: 150183521 = 1297 ⋅115793.

It is a cyclic number.

It is not a de Polignac number, because 125381051 - 2¹⁸ = 125118907 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 125381051.

It is not an unprimeable number, because it can be changed into a prime (125381059) 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, 17810 + ... + 23831.

It is an arithmetic number, because the mean of its divisors is an integer number (31356426).

Almost surely, 2^125381051 is an apocalyptic number.

125381051 is a deficient number, since it is larger than the sum of its proper divisors (44653).

125381051 is an equidigital number, since it uses as much as digits as its factorization.

125381051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44652.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 125381051 is about 11197.3680389634. The cubic root of 125381051 is about 500.5075526064.

The spelling of 125381051 in words is "one hundred twenty-five million, three hundred eighty-one thousand, fifty-one".