2537981 has 8 divisors (see below), whose sum is σ = 2804544. Its totient is φ = 2284480.

The previous prime is 2537959. The next prime is 2537987. The reversal of 2537981 is 1897352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2537981 - 2¹⁸ = 2275837 is a prime.

It is a super-2 number, since 2×2537981² = 12882695112722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2537987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855 + ... + 3636.

It is an arithmetic number, because the mean of its divisors is an integer number (350568).

2^2537981 is an apocalyptic number.

It is an amenable number.

2537981 is a deficient number, since it is larger than the sum of its proper divisors (266563).

2537981 is a wasteful number, since it uses less digits than its factorization.

2537981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6531.

The product of its digits is 15120, while the sum is 35.

The square root of 2537981 is about 1593.1042024927. The cubic root of 2537981 is about 136.4047379268.

The spelling of 2537981 in words is "two million, five hundred thirty-seven thousand, nine hundred eighty-one".