2642858 has 4 divisors (see below), whose sum is σ = 3964290. Its totient is φ = 1321428.

The previous prime is 2642839. The next prime is 2642863. The reversal of 2642858 is 8582462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 1087849 = 1247^2 + 1043^2 .

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660713 + ... + 660716.

2^2642858 is an apocalyptic number.

2642858 is a deficient number, since it is larger than the sum of its proper divisors (1321432).

2642858 is a wasteful number, since it uses less digits than its factorization.

2642858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321431.

The product of its digits is 30720, while the sum is 35.

The square root of 2642858 is about 1625.6869317307. The cubic root of 2642858 is about 138.2583203248.

The spelling of 2642858 in words is "two million, six hundred forty-two thousand, eight hundred fifty-eight".