15128791 has 2 divisors, whose sum is σ = 15128792. Its totient is φ = 15128790.

The previous prime is 15128767. The next prime is 15128803. The reversal of 15128791 is 19782151.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15128791 - 2¹⁵ = 15096023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15128741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7564395 + 7564396.

It is an arithmetic number, because the mean of its divisors is an integer number (7564396).

Almost surely, 2^15128791 is an apocalyptic number.

15128791 is a deficient number, since it is larger than the sum of its proper divisors (1).

15128791 is an equidigital number, since it uses as much as digits as its factorization.

15128791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 34.

The square root of 15128791 is about 3889.5746554090. The cubic root of 15128791 is about 247.3250322739.

The spelling of 15128791 in words is "fifteen million, one hundred twenty-eight thousand, seven hundred ninety-one".