126390025 has 6 divisors (see below), whose sum is σ = 156723662. Its totient is φ = 101112000.

The previous prime is 126390023. The next prime is 126390031. The reversal of 126390025 is 520093621.

It can be written as a sum of positive squares in 3 ways, for example, as 28933641 + 97456384 = 5379^2 + 9872^2 .

It is not a de Polignac number, because 126390025 - 2¹ = 126390023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126389975 and 126390002.

It is not an unprimeable number, because it can be changed into a prime (126390023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2527776 + ... + 2527825.

Almost surely, 2^126390025 is an apocalyptic number.

It is an amenable number.

126390025 is a deficient number, since it is larger than the sum of its proper divisors (30333637).

126390025 is an equidigital number, since it uses as much as digits as its factorization.

126390025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055611 (or 5055606 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 126390025 is about 11242.3318310749. The cubic root of 126390025 is about 501.8465388603.

The spelling of 126390025 in words is "one hundred twenty-six million, three hundred ninety thousand, twenty-five".