126420657 has 32 divisors (see below), whose sum is σ = 193536000. Its totient is φ = 72690240.

The previous prime is 126420649. The next prime is 126420667. The reversal of 126420657 is 756024621.

It is not a de Polignac number, because 126420657 - 2³ = 126420649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (126420667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55344 + ... + 57582.

It is an arithmetic number, because the mean of its divisors is an integer number (6048000).

Almost surely, 2^126420657 is an apocalyptic number.

It is an amenable number.

126420657 is a deficient number, since it is larger than the sum of its proper divisors (67115343).

126420657 is a wasteful number, since it uses less digits than its factorization.

126420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 126420657 is about 11243.6940993608. The cubic root of 126420657 is about 501.8870782447.

The spelling of 126420657 in words is "one hundred twenty-six million, four hundred twenty thousand, six hundred fifty-seven".