15442871 has 2 divisors, whose sum is σ = 15442872. Its totient is φ = 15442870.

The previous prime is 15442859. The next prime is 15442907. The reversal of 15442871 is 17824451.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15442871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15442811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7721435 + 7721436.

It is an arithmetic number, because the mean of its divisors is an integer number (7721436).

Almost surely, 2^15442871 is an apocalyptic number.

15442871 is a deficient number, since it is larger than the sum of its proper divisors (1).

15442871 is an equidigital number, since it uses as much as digits as its factorization.

15442871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 15442871 is about 3929.7418490277. The cubic root of 15442871 is about 249.0248465822.

Adding to 15442871 its sum of digits (32), we get a triangular number (15442903 = T₅₅₅₇).

The spelling of 15442871 in words is "fifteen million, four hundred forty-two thousand, eight hundred seventy-one".