2501491 has 4 divisors (see below), whose sum is σ = 2535832. Its totient is φ = 2467152.

The previous prime is 2501489. The next prime is 2501501. The reversal of 2501491 is 1941052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2501491 - 2¹ = 2501489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501461) 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, 17061 + ... + 17206.

It is an arithmetic number, because the mean of its divisors is an integer number (633958).

2^2501491 is an apocalyptic number.

2501491 is a deficient number, since it is larger than the sum of its proper divisors (34341).

2501491 is an equidigital number, since it uses as much as digits as its factorization.

2501491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34340.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2501491 is about 1581.6102554043. The cubic root of 2501491 is about 135.7478567787.

It can be divided in two parts, 2501 and 491, that added together give a palindrome (2992).

The spelling of 2501491 in words is "two million, five hundred one thousand, four hundred ninety-one".