15424991 has 2 divisors, whose sum is σ = 15424992. Its totient is φ = 15424990.

The previous prime is 15424957. The next prime is 15424993. The reversal of 15424991 is 19942451.

It is a strong prime.

It is an emirp because it is prime and its reverse (19942451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15424991 - 2¹⁴ = 15408607 is a prime.

Together with 15424993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15424993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7712495 + 7712496.

It is an arithmetic number, because the mean of its divisors is an integer number (7712496).

Almost surely, 2^15424991 is an apocalyptic number.

15424991 is a deficient number, since it is larger than the sum of its proper divisors (1).

15424991 is an equidigital number, since it uses as much as digits as its factorization.

15424991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 15424991 is about 3927.4662315544. The cubic root of 15424991 is about 248.9287011660.

The spelling of 15424991 in words is "fifteen million, four hundred twenty-four thousand, nine hundred ninety-one".