125431051 has 2 divisors, whose sum is σ = 125431052. Its totient is φ = 125431050.

The previous prime is 125431039. The next prime is 125431069. The reversal of 125431051 is 150134521.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (150134521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125431051 - 2¹⁹ = 124906763 is a prime.

It is not a weakly prime, because it can be changed into another prime (125431021) 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 as a sum of consecutive naturals, namely, 62715525 + 62715526.

It is an arithmetic number, because the mean of its divisors is an integer number (62715526).

Almost surely, 2^125431051 is an apocalyptic number.

125431051 is a deficient number, since it is larger than the sum of its proper divisors (1).

125431051 is an equidigital number, since it uses as much as digits as its factorization.

125431051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 125431051 is about 11199.6004839458. The cubic root of 125431051 is about 500.5740752895.

Adding to 125431051 its reverse (150134521), we get a palindrome (275565572).

The spelling of 125431051 in words is "one hundred twenty-five million, four hundred thirty-one thousand, fifty-one".