125705513 has 2 divisors, whose sum is σ = 125705514. Its totient is φ = 125705512.

The previous prime is 125705507. The next prime is 125705519. The reversal of 125705513 is 315507521.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (125705507) and next prime (125705519).

It can be written as a sum of positive squares in only one way, i.e., 95981209 + 29724304 = 9797^2 + 5452^2 .

It is a cyclic number.

It is not a de Polignac number, because 125705513 - 2¹⁸ = 125443369 is a prime.

It is not a weakly prime, because it can be changed into another prime (125705519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62852756 + 62852757.

It is an arithmetic number, because the mean of its divisors is an integer number (62852757).

Almost surely, 2^125705513 is an apocalyptic number.

It is an amenable number.

125705513 is a deficient number, since it is larger than the sum of its proper divisors (1).

125705513 is an equidigital number, since it uses as much as digits as its factorization.

125705513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 125705513 is about 11211.8469932478. The cubic root of 125705513 is about 500.9389197558.

The spelling of 125705513 in words is "one hundred twenty-five million, seven hundred five thousand, five hundred thirteen".