2657642 has 8 divisors (see below), whose sum is σ = 4293156. Its totient is φ = 1226592.

The previous prime is 2657617. The next prime is 2657651. The reversal of 2657642 is 2467562.

It can be written as a sum of positive squares in 2 ways, for example, as 2621161 + 36481 = 1619^2 + 191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2657642² = 14126122000328, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 6² + 5⁹ + 7⁴ + 6⁶ + 4³ + 2¹⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 2657599 and 2657608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51083 + ... + 51134.

2^2657642 is an apocalyptic number.

2657642 is a deficient number, since it is larger than the sum of its proper divisors (1635514).

2657642 is a wasteful number, since it uses less digits than its factorization.

2657642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102232.

The product of its digits is 20160, while the sum is 32.

The square root of 2657642 is about 1630.2275914730. The cubic root of 2657642 is about 138.5156442076.

The spelling of 2657642 in words is "two million, six hundred fifty-seven thousand, six hundred forty-two".