16253642 has 4 divisors (see below), whose sum is σ = 24380466. Its totient is φ = 8126820.

The previous prime is 16253603. The next prime is 16253647. The reversal of 16253642 is 24635261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15832441 + 421201 = 3979^2 + 649^2 .

It is not an unprimeable number, because it can be changed into a prime (16253647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063409 + ... + 4063412.

Almost surely, 2^16253642 is an apocalyptic number.

16253642 is a deficient number, since it is larger than the sum of its proper divisors (8126824).

16253642 is an equidigital number, since it uses as much as digits as its factorization.

16253642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126823.

The product of its digits is 8640, while the sum is 29.

The square root of 16253642 is about 4031.5805833445. The cubic root of 16253642 is about 253.3087722418.

The spelling of 16253642 in words is "sixteen million, two hundred fifty-three thousand, six hundred forty-two".