126561646 has 8 divisors (see below), whose sum is σ = 189971064. Its totient is φ = 63237960.

The previous prime is 126561619. The next prime is 126561653. The reversal of 126561646 is 646165621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17605 + ... + 23728.

It is an arithmetic number, because the mean of its divisors is an integer number (23746383).

Almost surely, 2^126561646 is an apocalyptic number.

126561646 is a deficient number, since it is larger than the sum of its proper divisors (63409418).

126561646 is a wasteful number, since it uses less digits than its factorization.

126561646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42866.

The product of its digits is 51840, while the sum is 37.

The square root of 126561646 is about 11249.9620443804. The cubic root of 126561646 is about 502.0735832836.

The spelling of 126561646 in words is "one hundred twenty-six million, five hundred sixty-one thousand, six hundred forty-six".