2646442 has 4 divisors (see below), whose sum is σ = 3969666. Its totient is φ = 1323220.

The previous prime is 2646409. The next prime is 2646443. The reversal of 2646442 is 2446462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2446462 = 2 ⋅1223231.

It can be written as a sum of positive squares in only one way, i.e., 2621161 + 25281 = 1619^2 + 159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2646442.

It is not an unprimeable number, because it can be changed into a prime (2646443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661609 + ... + 661612.

2^2646442 is an apocalyptic number.

2646442 is a deficient number, since it is larger than the sum of its proper divisors (1323224).

2646442 is a wasteful number, since it uses less digits than its factorization.

2646442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323223.

The product of its digits is 9216, while the sum is 28.

The square root of 2646442 is about 1626.7888615306. The cubic root of 2646442 is about 138.3207898176.

The spelling of 2646442 in words is "two million, six hundred forty-six thousand, four hundred forty-two".