2985981 has 4 divisors (see below), whose sum is σ = 3981312. Its totient is φ = 1990652.

The previous prime is 2985979. The next prime is 2985991. The reversal of 2985981 is 1895892.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2985981 - 2¹ = 2985979 is a prime.

It is a super-2 number, since 2×2985981² = 17832165064722, which contains 22 as substring.

It is a D-number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2985901) 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, 497661 + ... + 497666.

It is an arithmetic number, because the mean of its divisors is an integer number (995328).

2^2985981 is an apocalyptic number.

It is an amenable number.

2985981 is a deficient number, since it is larger than the sum of its proper divisors (995331).

2985981 is an equidigital number, since it uses as much as digits as its factorization.

2985981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995330.

The product of its digits is 51840, while the sum is 42.

The square root of 2985981 is about 1727.9991319442. Note that the first 3 decimals coincide. The cubic root of 2985981 is about 143.9999517747. Note that the first 4 decimals are identical.

The spelling of 2985981 in words is "two million, nine hundred eighty-five thousand, nine hundred eighty-one".