2653642 has 4 divisors (see below), whose sum is σ = 3980466. Its totient is φ = 1326820.

The previous prime is 2653633. The next prime is 2653681. The reversal of 2653642 is 2463562.

It is a happy number.

It is a Cunningham number, because it is equal to 1629²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2463562 = 2 ⋅1231781.

It can be written as a sum of positive squares in only one way, i.e., 2653641 + 1 = 1629^2 + 1^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2653642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663409 + ... + 663412.

2^2653642 is an apocalyptic number.

2653642 is a deficient number, since it is larger than the sum of its proper divisors (1326824).

2653642 is a wasteful number, since it uses less digits than its factorization.

2653642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326823.

The product of its digits is 8640, while the sum is 28.

The square root of 2653642 is about 1629.0003069367. Note that the first 3 decimals coincide. The cubic root of 2653642 is about 138.4461163102.

The spelling of 2653642 in words is "two million, six hundred fifty-three thousand, six hundred forty-two".