126426509 has 8 divisors (see below), whose sum is σ = 138684000. Its totient is φ = 114296400.

The previous prime is 126426481. The next prime is 126426539. The reversal of 126426509 is 905624621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126426509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126426539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29759 + ... + 33740.

It is an arithmetic number, because the mean of its divisors is an integer number (17335500).

Almost surely, 2^126426509 is an apocalyptic number.

It is an amenable number.

126426509 is a deficient number, since it is larger than the sum of its proper divisors (12257491).

126426509 is a wasteful number, since it uses less digits than its factorization.

126426509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63691.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 126426509 is about 11243.9543311061. The cubic root of 126426509 is about 501.8948222267.

The spelling of 126426509 in words is "one hundred twenty-six million, four hundred twenty-six thousand, five hundred nine".