2499669 has 6 divisors (see below), whose sum is σ = 3610646. Its totient is φ = 1666440.

The previous prime is 2499667. The next prime is 2499671. The reversal of 2499669 is 9669942.

It is an interprime number because it is at equal distance from previous prime (2499667) and next prime (2499671).

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 19044 = 1575^2 + 138^2 .

It is not a de Polignac number, because 2499669 - 2¹ = 2499667 is a prime.

It is a super-2 number, since 2×2499669² = 12496690219122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138862 + ... + 138879.

2^2499669 is an apocalyptic number.

It is an amenable number.

2499669 is a deficient number, since it is larger than the sum of its proper divisors (1110977).

2499669 is a wasteful number, since it uses less digits than its factorization.

2499669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277747 (or 277744 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 2499669 is about 1581.0341552288. The cubic root of 2499669 is about 135.7148907505.

The spelling of 2499669 in words is "two million, four hundred ninety-nine thousand, six hundred sixty-nine".