14157509 has 2 divisors, whose sum is σ = 14157510. Its totient is φ = 14157508.

The previous prime is 14157503. The next prime is 14157523. The reversal of 14157509 is 90575141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 1555009 = 3550^2 + 1247^2 .

It is an emirp because it is prime and its reverse (90575141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14157509 - 2¹² = 14153413 is a prime.

It is a super-2 number, since 2×14157509² = 400870122170162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14157503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078754 + 7078755.

It is an arithmetic number, because the mean of its divisors is an integer number (7078755).

Almost surely, 2^14157509 is an apocalyptic number.

It is an amenable number.

14157509 is a deficient number, since it is larger than the sum of its proper divisors (1).

14157509 is an equidigital number, since it uses as much as digits as its factorization.

14157509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 14157509 is about 3762.6465419967. The cubic root of 14157509 is about 241.9147127915.

The spelling of 14157509 in words is "fourteen million, one hundred fifty-seven thousand, five hundred nine".