11971542 has 16 divisors (see below), whose sum is σ = 26119872. Its totient is φ = 3627720.

The previous prime is 11971541. The next prime is 11971567. The reversal of 11971542 is 24517911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90628 + ... + 90759.

It is an arithmetic number, because the mean of its divisors is an integer number (1632492).

Almost surely, 2^11971542 is an apocalyptic number.

11971542 is an abundant number, since it is smaller than the sum of its proper divisors (14148330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11971542 is a wasteful number, since it uses less digits than its factorization.

11971542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181403.

The product of its digits is 2520, while the sum is 30.

The square root of 11971542 is about 3459.9916184870. The cubic root of 11971542 is about 228.7617259360.

The spelling of 11971542 in words is "eleven million, nine hundred seventy-one thousand, five hundred forty-two".