2499971 has 4 divisors (see below), whose sum is σ = 2537352. Its totient is φ = 2462592.

The previous prime is 2499967. The next prime is 2499983. The reversal of 2499971 is 1799942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1799942 = 2 ⋅899971.

It is a cyclic number.

It is not a de Polignac number, because 2499971 - 2² = 2499967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2499941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18590 + ... + 18723.

It is an arithmetic number, because the mean of its divisors is an integer number (634338).

2^2499971 is an apocalyptic number.

2499971 is a deficient number, since it is larger than the sum of its proper divisors (37381).

2499971 is an equidigital number, since it uses as much as digits as its factorization.

2499971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37380.

The product of its digits is 40824, while the sum is 41.

The square root of 2499971 is about 1581.1296594524. The cubic root of 2499971 is about 135.7203560403.

The spelling of 2499971 in words is "two million, four hundred ninety-nine thousand, nine hundred seventy-one".