2491138 has 8 divisors (see below), whose sum is σ = 4024188. Its totient is φ = 1149744.

The previous prime is 2491123. The next prime is 2491171. The reversal of 2491138 is 8311942.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1968409 + 522729 = 1403^2 + 723^2 .

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

It is an Ulam number.

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, 47881 + ... + 47932.

2^2491138 is an apocalyptic number.

2491138 is a deficient number, since it is larger than the sum of its proper divisors (1533050).

2491138 is a wasteful number, since it uses less digits than its factorization.

2491138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95828.

The product of its digits is 1728, while the sum is 28.

The square root of 2491138 is about 1578.3339317141. Note that the first 3 decimals coincide. The cubic root of 2491138 is about 135.5603231723.

The spelling of 2491138 in words is "two million, four hundred ninety-one thousand, one hundred thirty-eight".