5901981 has 8 divisors (see below), whose sum is σ = 8082144. Its totient is φ = 3828240.

The previous prime is 5901971. The next prime is 5902019. The reversal of 5901981 is 1891095.

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

It is a de Polignac number, because none of the positive numbers 2^k-5901981 is a prime.

It is a super-2 number, since 2×5901981² = 69666759448722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5901901) 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, 26475 + ... + 26696.

It is an arithmetic number, because the mean of its divisors is an integer number (1010268).

Almost surely, 2^5901981 is an apocalyptic number.

It is an amenable number.

5901981 is a deficient number, since it is larger than the sum of its proper divisors (2180163).

5901981 is a wasteful number, since it uses less digits than its factorization.

5901981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53211.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 5901981 is about 2429.3993084711. The cubic root of 5901981 is about 180.7171084280.

The spelling of 5901981 in words is "five million, nine hundred one thousand, nine hundred eighty-one".