15402091 has 2 divisors, whose sum is σ = 15402092. Its totient is φ = 15402090.

The previous prime is 15402089. The next prime is 15402097. The reversal of 15402091 is 19020451.

15402091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (19020451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15402091 - 2¹ = 15402089 is a prime.

Together with 15402089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15402097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7701045 + 7701046.

It is an arithmetic number, because the mean of its divisors is an integer number (7701046).

Almost surely, 2^15402091 is an apocalyptic number.

15402091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15402091 is an equidigital number, since it uses as much as digits as its factorization.

15402091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 15402091 is about 3924.5497830961. The cubic root of 15402091 is about 248.8054533239.

The spelling of 15402091 in words is "fifteen million, four hundred two thousand, ninety-one".