2151742 has 16 divisors (see below), whose sum is σ = 3486240. Its totient is φ = 992992.

The previous prime is 2151703. The next prime is 2151767. The reversal of 2151742 is 2471512.

It is a happy number.

2151742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (217890).

2^2151742 is an apocalyptic number.

2151742 is a deficient number, since it is larger than the sum of its proper divisors (1334498).

2151742 is a wasteful number, since it uses less digits than its factorization.

2151742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667.

The product of its digits is 560, while the sum is 22.

The square root of 2151742 is about 1466.8817266569. The cubic root of 2151742 is about 129.1011365602.

The spelling of 2151742 in words is "two million, one hundred fifty-one thousand, seven hundred forty-two".