13642394 has 4 divisors (see below), whose sum is σ = 20463594. Its totient is φ = 6821196.

The previous prime is 13642357. The next prime is 13642423. The reversal of 13642394 is 49324631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49324631 = 547 ⋅90173.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 1075369 = 3545^2 + 1037^2 .

It is a super-2 number, since 2×13642394² = 372229828102472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13642394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410597 + ... + 3410600.

Almost surely, 2^13642394 is an apocalyptic number.

13642394 is a deficient number, since it is larger than the sum of its proper divisors (6821200).

13642394 is an equidigital number, since it uses as much as digits as its factorization.

13642394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821199.

The product of its digits is 15552, while the sum is 32.

The square root of 13642394 is about 3693.5611542250. The cubic root of 13642394 is about 238.9444033072.

The spelling of 13642394 in words is "thirteen million, six hundred forty-two thousand, three hundred ninety-four".