15120949 has 2 divisors, whose sum is σ = 15120950. Its totient is φ = 15120948.

The previous prime is 15120947. The next prime is 15120991. The reversal of 15120949 is 94902151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13950225 + 1170724 = 3735^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120949 - 2¹ = 15120947 is a prime.

Together with 15120947, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15120949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15120943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560474 + 7560475.

It is an arithmetic number, because the mean of its divisors is an integer number (7560475).

Almost surely, 2^15120949 is an apocalyptic number.

It is an amenable number.

15120949 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120949 is an equidigital number, since it uses as much as digits as its factorization.

15120949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 15120949 is about 3888.5664453626. The cubic root of 15120949 is about 247.2822912926.

The spelling of 15120949 in words is "fifteen million, one hundred twenty thousand, nine hundred forty-nine".