11977142 has 4 divisors (see below), whose sum is σ = 17965716. Its totient is φ = 5988570.

The previous prime is 11977123. The next prime is 11977153. The reversal of 11977142 is 24177911.

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

It is a junction number, because it is equal to n+sod(n) for n = 11977099 and 11977108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2994284 + ... + 2994287.

It is an arithmetic number, because the mean of its divisors is an integer number (4491429).

Almost surely, 2^11977142 is an apocalyptic number.

11977142 is a deficient number, since it is larger than the sum of its proper divisors (5988574).

11977142 is an equidigital number, since it uses as much as digits as its factorization.

11977142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5988573.

The product of its digits is 3528, while the sum is 32.

The square root of 11977142 is about 3460.8007743873. The cubic root of 11977142 is about 228.7973901238.

The spelling of 11977142 in words is "eleven million, nine hundred seventy-seven thousand, one hundred forty-two".