2501641 has 6 divisors (see below), whose sum is σ = 2615690. Its totient is φ = 2392368.

The previous prime is 2501623. The next prime is 2501647. The reversal of 2501641 is 1461052.

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 1071225 = 1196^2 + 1035^2 .

It is not a de Polignac number, because 2501641 - 2¹⁷ = 2370569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501647) 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, 1836 + ... + 2893.

2^2501641 is an apocalyptic number.

It is an amenable number.

2501641 is a deficient number, since it is larger than the sum of its proper divisors (114049).

2501641 is an equidigital number, since it uses as much as digits as its factorization.

2501641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775 (or 4752 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2501641 is about 1581.6576747198. The cubic root of 2501641 is about 135.7505700634.

Adding to 2501641 its reverse (1461052), we get a palindrome (3962693).

It can be divided in two parts, 250 and 1641, that added together give a triangular number (1891 = T₆₁).

The spelling of 2501641 in words is "two million, five hundred one thousand, six hundred forty-one".