3512981 has 2 divisors, whose sum is σ = 3512982. Its totient is φ = 3512980.

The previous prime is 3512969. The next prime is 3512983. The reversal of 3512981 is 1892153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2640625 + 872356 = 1625^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 3512981 - 2¹⁸ = 3250837 is a prime.

It is a super-2 number, since 2×3512981² = 24682071012722, which contains 22 as substring.

Together with 3512983, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3512983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1756490 + 1756491.

It is an arithmetic number, because the mean of its divisors is an integer number (1756491).

Almost surely, 2^3512981 is an apocalyptic number.

It is an amenable number.

3512981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3512981 is an equidigital number, since it uses as much as digits as its factorization.

3512981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 3512981 is about 1874.2948007184. The cubic root of 3512981 is about 152.0169215926.

The spelling of 3512981 in words is "three million, five hundred twelve thousand, nine hundred eighty-one".