2501971 has 4 divisors (see below), whose sum is σ = 2549232. Its totient is φ = 2454712.

The previous prime is 2501959. The next prime is 2501987. The reversal of 2501971 is 1791052.

2501971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2501971 - 2⁷ = 2501843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23551 + ... + 23656.

It is an arithmetic number, because the mean of its divisors is an integer number (637308).

2^2501971 is an apocalyptic number.

2501971 is a deficient number, since it is larger than the sum of its proper divisors (47261).

2501971 is an equidigital number, since it uses as much as digits as its factorization.

2501971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47260.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2501971 is about 1581.7619922100. The cubic root of 2501971 is about 135.7565389079.

The spelling of 2501971 in words is "two million, five hundred one thousand, nine hundred seventy-one".