12190642 has 4 divisors (see below), whose sum is σ = 18285966. Its totient is φ = 6095320.

The previous prime is 12190631. The next prime is 12190681. The reversal of 12190642 is 24609121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24609121 = 409 ⋅60169.

It can be written as a sum of positive squares in only one way, i.e., 6859161 + 5331481 = 2619^2 + 2309^2 .

It is a super-2 number, since 2×12190642² = 297223504744328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3047659 + ... + 3047662.

Almost surely, 2^12190642 is an apocalyptic number.

12190642 is a deficient number, since it is larger than the sum of its proper divisors (6095324).

12190642 is an equidigital number, since it uses as much as digits as its factorization.

12190642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095323.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12190642 is about 3491.5099885293. The cubic root of 12190642 is about 230.1488765179.

Adding to 12190642 its reverse (24609121), we get a palindrome (36799763).

The spelling of 12190642 in words is "twelve million, one hundred ninety thousand, six hundred forty-two".