16254991 has 2 divisors, whose sum is σ = 16254992. Its totient is φ = 16254990.

The previous prime is 16254977. The next prime is 16255027. The reversal of 16254991 is 19945261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16254991 - 2¹³ = 16246799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16254991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16254971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8127495 + 8127496.

It is an arithmetic number, because the mean of its divisors is an integer number (8127496).

Almost surely, 2^16254991 is an apocalyptic number.

16254991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16254991 is an equidigital number, since it uses as much as digits as its factorization.

16254991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 16254991 is about 4031.7478839828. The cubic root of 16254991 is about 253.3157799857.

The spelling of 16254991 in words is "sixteen million, two hundred fifty-four thousand, nine hundred ninety-one".