2142749685 has 32 divisors (see below), whose sum is σ = 3472035840. Its totient is φ = 1128322368.

The previous prime is 2142749677. The next prime is 2142749711. The reversal of 2142749685 is 5869472412.

It is not a de Polignac number, because 2142749685 - 2³ = 2142749677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 565126 + ... + 568904.

It is an arithmetic number, because the mean of its divisors is an integer number (108501120).

Almost surely, 2^2142749685 is an apocalyptic number.

It is an amenable number.

2142749685 is a deficient number, since it is larger than the sum of its proper divisors (1329286155).

2142749685 is a wasteful number, since it uses less digits than its factorization.

2142749685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257.

The product of its digits is 967680, while the sum is 48.

The square root of 2142749685 is about 46289.8442965625. The cubic root of 2142749685 is about 1289.2104386569.

The spelling of 2142749685 in words is "two billion, one hundred forty-two million, seven hundred forty-nine thousand, six hundred eighty-five".