126009725 has 6 divisors (see below), whose sum is σ = 156252090. Its totient is φ = 100807760.

The previous prime is 126009707. The next prime is 126009739. The reversal of 126009725 is 527900621.

It can be written as a sum of positive squares in 3 ways, for example, as 10640644 + 115369081 = 3262^2 + 10741^2 .

It is not a de Polignac number, because 126009725 - 2¹² = 126005629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126009691 and 126009700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2520170 + ... + 2520219.

It is an arithmetic number, because the mean of its divisors is an integer number (26042015).

Almost surely, 2^126009725 is an apocalyptic number.

It is an amenable number.

126009725 is a deficient number, since it is larger than the sum of its proper divisors (30242365).

126009725 is an equidigital number, since it uses as much as digits as its factorization.

126009725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040399 (or 5040394 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 126009725 is about 11225.4053378931. The cubic root of 126009725 is about 501.3426911335.

The spelling of 126009725 in words is "one hundred twenty-six million, nine thousand, seven hundred twenty-five".