2151442 has 16 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 1043280.

The previous prime is 2151433. The next prime is 2151451. The reversal of 2151442 is 2441512.

It is an interprime number because it is at equal distance from previous prime (2151433) and next prime (2151451).

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 7 ways as a sum of consecutive naturals, for example, 15409 + ... + 15547.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2^2151442 is an apocalyptic number.

2151442 is a deficient number, since it is larger than the sum of its proper divisors (1174958).

2151442 is a wasteful number, since it uses less digits than its factorization.

2151442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its digits is 320, while the sum is 19.

The square root of 2151442 is about 1466.7794653594. The cubic root of 2151442 is about 129.0951364386.

Adding to 2151442 its reverse (2441512), we get a palindrome (4592954).

The spelling of 2151442 in words is "two million, one hundred fifty-one thousand, four hundred forty-two".