2491402 has 4 divisors (see below), whose sum is σ = 3737106. Its totient is φ = 1245700.

The previous prime is 2491397. The next prime is 2491453. The reversal of 2491402 is 2041942.

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., 2307361 + 184041 = 1519^2 + 429^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁵ + 9 + 1 + 4⁹ + 0 + 2²¹ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622849 + ... + 622852.

2^2491402 is an apocalyptic number.

2491402 is a deficient number, since it is larger than the sum of its proper divisors (1245704).

2491402 is a wasteful number, since it uses less digits than its factorization.

2491402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245703.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2491402 is about 1578.4175619905. The cubic root of 2491402 is about 135.5651117015.

The spelling of 2491402 in words is "two million, four hundred ninety-one thousand, four hundred two".