2155042 has 12 divisors (see below), whose sum is σ = 3318498. Its totient is φ = 1049600.

The previous prime is 2155009. The next prime is 2155057. The reversal of 2155042 is 2405512.

It can be written as a sum of positive squares in 3 ways, for example, as 1212201 + 942841 = 1101^2 + 971^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3042 + ... + 3682.

2^2155042 is an apocalyptic number.

2155042 is a deficient number, since it is larger than the sum of its proper divisors (1163456).

2155042 is an equidigital number, since it uses as much as digits as its factorization.

2155042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2155042 is about 1468.0061307774. The cubic root of 2155042 is about 129.1671011201.

The spelling of 2155042 in words is "two million, one hundred fifty-five thousand, forty-two".