125903551 has 2 divisors, whose sum is σ = 125903552. Its totient is φ = 125903550.

The previous prime is 125903549. The next prime is 125903597. The reversal of 125903551 is 155309521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125903551 - 2¹ = 125903549 is a prime.

Together with 125903549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125903501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62951775 + 62951776.

It is an arithmetic number, because the mean of its divisors is an integer number (62951776).

Almost surely, 2^125903551 is an apocalyptic number.

125903551 is a deficient number, since it is larger than the sum of its proper divisors (1).

125903551 is an equidigital number, since it uses as much as digits as its factorization.

125903551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 125903551 is about 11220.6751579395. The cubic root of 125903551 is about 501.2018434965.

The spelling of 125903551 in words is "one hundred twenty-five million, nine hundred three thousand, five hundred fifty-one".