1045994556 has 12 divisors (see below), whose sum is σ = 2440653992. Its totient is φ = 348664848.

The previous prime is 1045994519. The next prime is 1045994567. The reversal of 1045994556 is 6554995401.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1045994556² = 2188209222363274272, 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 in 3 ways as a sum of consecutive naturals, for example, 43583095 + ... + 43583118.

Almost surely, 2^1045994556 is an apocalyptic number.

It is an amenable number.

1045994556 is an abundant number, since it is smaller than the sum of its proper divisors (1394659436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045994556 is a wasteful number, since it uses less digits than its factorization.

1045994556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87166220 (or 87166218 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The square root of 1045994556 is about 32341.8390942754. The cubic root of 1045994556 is about 1015.1022912916.

The spelling of 1045994556 in words is "one billion, forty-five million, nine hundred ninety-four thousand, five hundred fifty-six".