2491624 has 8 divisors (see below), whose sum is σ = 4671810. Its totient is φ = 1245808.

The previous prime is 2491609. The next prime is 2491649. The reversal of 2491624 is 4261942.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 669124 = 1350^2 + 818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2491592 and 2491601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155719 + ... + 155734.

2^2491624 is an apocalyptic number.

It is an amenable number.

2491624 is a deficient number, since it is larger than the sum of its proper divisors (2180186).

2491624 is a wasteful number, since it uses less digits than its factorization.

2491624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311459 (or 311455 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 2491624 is about 1578.4878840207. The cubic root of 2491624 is about 135.5691381574.

The spelling of 2491624 in words is "two million, four hundred ninety-one thousand, six hundred twenty-four".