2152981 has 8 divisors (see below), whose sum is σ = 2240000. Its totient is φ = 2067120.

The previous prime is 2152973. The next prime is 2153051. The reversal of 2152981 is 1892512.

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 2152981 - 2³ = 2152973 is a prime.

It is a super-2 number, since 2×2152981² = 9270654372722, 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 (2152921) 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, 5995 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

2^2152981 is an apocalyptic number.

It is an amenable number.

2152981 is a deficient number, since it is larger than the sum of its proper divisors (87019).

2152981 is a wasteful number, since it uses less digits than its factorization.

2152981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 1440, while the sum is 28.

The square root of 2152981 is about 1467.3039903169. The cubic root of 2152981 is about 129.1259111562.

It can be divided in two parts, 2152 and 981, that multiplied together give a palindrome (2111112).

The spelling of 2152981 in words is "two million, one hundred fifty-two thousand, nine hundred eighty-one".