2501626 has 4 divisors (see below), whose sum is σ = 3752442. Its totient is φ = 1250812.

The previous prime is 2501623. The next prime is 2501647. The reversal of 2501626 is 6261052.

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., 1863225 + 638401 = 1365^2 + 799^2 .

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 junction number, because it is equal to n+sod(n) for n = 2501597 and 2501606.

It is not an unprimeable number, because it can be changed into a prime (2501623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625405 + ... + 625408.

2^2501626 is an apocalyptic number.

2501626 is a deficient number, since it is larger than the sum of its proper divisors (1250816).

2501626 is a wasteful number, since it uses less digits than its factorization.

2501626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250815.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2501626 is about 1581.6529328522. The cubic root of 2501626 is about 135.7502987398.

Adding to 2501626 its reverse (6261052), we get a palindrome (8762678).

The spelling of 2501626 in words is "two million, five hundred one thousand, six hundred twenty-six".