15401387 has 2 divisors, whose sum is σ = 15401388. Its totient is φ = 15401386.

The previous prime is 15401333. The next prime is 15401431. The reversal of 15401387 is 78310451.

15401387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15401387 - 2¹⁶ = 15335851 is a prime.

It is not a weakly prime, because it can be changed into another prime (15401317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7700693 + 7700694.

It is an arithmetic number, because the mean of its divisors is an integer number (7700694).

Almost surely, 2^15401387 is an apocalyptic number.

15401387 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401387 is an equidigital number, since it uses as much as digits as its factorization.

15401387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 15401387 is about 3924.4600902545. The cubic root of 15401387 is about 248.8016624596.

The spelling of 15401387 in words is "fifteen million, four hundred one thousand, three hundred eighty-seven".