2025981 has 6 divisors (see below), whose sum is σ = 2926430. Its totient is φ = 1350648.

The previous prime is 2025979. The next prime is 2026021. The reversal of 2025981 is 1895202.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 793881 = 1110^2 + 891^2 .

It is not a de Polignac number, because 2025981 - 2¹ = 2025979 is a prime.

It is a super-2 number, since 2×2025981² = 8209198024722, 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 (2025901) 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, 112546 + ... + 112563.

2^2025981 is an apocalyptic number.

It is an amenable number.

2025981 is a deficient number, since it is larger than the sum of its proper divisors (900449).

2025981 is a wasteful number, since it uses less digits than its factorization.

2025981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225115 (or 225112 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2025981 is about 1423.3695936053. The cubic root of 2025981 is about 126.5353263106.

The spelling of 2025981 in words is "two million, twenty-five thousand, nine hundred eighty-one".