7155556 has 12 divisors (see below), whose sum is σ = 12565168. Its totient is φ = 3565512.

The previous prime is 7155539. The next prime is 7155559. The reversal of 7155556 is 6555517.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7155559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686 + ... + 4141.

Almost surely, 2^7155556 is an apocalyptic number.

It is an amenable number.

7155556 is a deficient number, since it is larger than the sum of its proper divisors (5409612).

7155556 is a wasteful number, since it uses less digits than its factorization.

7155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138 (or 6136 counting only the distinct ones).

The product of its digits is 26250, while the sum is 34.

The square root of 7155556 is about 2674.9871027726. The cubic root of 7155556 is about 192.6997398288.

The spelling of 7155556 in words is "seven million, one hundred fifty-five thousand, five hundred fifty-six".