15127891 has 2 divisors, whose sum is σ = 15127892. Its totient is φ = 15127890.

The previous prime is 15127877. The next prime is 15127897. The reversal of 15127891 is 19872151.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15127891 - 2⁹ = 15127379 is a prime.

It is a super-2 number, since 2×15127891² = 457706172215762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15127897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7563945 + 7563946.

It is an arithmetic number, because the mean of its divisors is an integer number (7563946).

Almost surely, 2^15127891 is an apocalyptic number.

15127891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15127891 is an equidigital number, since it uses as much as digits as its factorization.

15127891 is an evil number, because the sum of its binary digits is even.

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

The square root of 15127891 is about 3889.4589598040. The cubic root of 15127891 is about 247.3201277854.

The spelling of 15127891 in words is "fifteen million, one hundred twenty-seven thousand, eight hundred ninety-one".