125054009 has 2 divisors, whose sum is σ = 125054010. Its totient is φ = 125054008.

The previous prime is 125053997. The next prime is 125054063. The reversal of 125054009 is 900450521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 9168784 = 10765^2 + 3028^2 .

It is a cyclic number.

It is not a de Polignac number, because 125054009 - 2⁴ = 125053993 is a prime.

It is not a weakly prime, because it can be changed into another prime (125054309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62527004 + 62527005.

It is an arithmetic number, because the mean of its divisors is an integer number (62527005).

Almost surely, 2^125054009 is an apocalyptic number.

It is an amenable number.

125054009 is a deficient number, since it is larger than the sum of its proper divisors (1).

125054009 is an equidigital number, since it uses as much as digits as its factorization.

125054009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 125054009 is about 11182.7549825613. The cubic root of 125054009 is about 500.0720016310.

The spelling of 125054009 in words is "one hundred twenty-five million, fifty-four thousand, nine".