42126556 has 6 divisors (see below), whose sum is σ = 73721480. Its totient is φ = 21063276.

The previous prime is 42126533. The next prime is 42126563. The reversal of 42126556 is 65562124.

It is a super-2 number, since 2×42126556² = 3549293440842272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265816 + ... + 5265823.

Almost surely, 2^42126556 is an apocalyptic number.

It is an amenable number.

42126556 is a deficient number, since it is larger than the sum of its proper divisors (31594924).

42126556 is a wasteful number, since it uses less digits than its factorization.

42126556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531643 (or 10531641 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 42126556 is about 6490.4973615279. The cubic root of 42126556 is about 347.9514509276.

The spelling of 42126556 in words is "forty-two million, one hundred twenty-six thousand, five hundred fifty-six".