15146981 has 2 divisors, whose sum is σ = 15146982. Its totient is φ = 15146980.

The previous prime is 15146953. The next prime is 15147001. The reversal of 15146981 is 18964151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11498881 + 3648100 = 3391^2 + 1910^2 .

It is an emirp because it is prime and its reverse (18964151) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15146981 is a prime.

It is a super-2 number, since 2×15146981² = 458862066828722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15146921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7573490 + 7573491.

It is an arithmetic number, because the mean of its divisors is an integer number (7573491).

Almost surely, 2^15146981 is an apocalyptic number.

It is an amenable number.

15146981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15146981 is an equidigital number, since it uses as much as digits as its factorization.

15146981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 15146981 is about 3891.9122549205. The cubic root of 15146981 is about 247.4241157695.

The spelling of 15146981 in words is "fifteen million, one hundred forty-six thousand, nine hundred eighty-one".