11921534 has 4 divisors (see below), whose sum is σ = 17882304. Its totient is φ = 5960766.

The previous prime is 11921519. The next prime is 11921537. The reversal of 11921534 is 43512911.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2980382 + ... + 2980385.

It is an arithmetic number, because the mean of its divisors is an integer number (4470576).

Almost surely, 2^11921534 is an apocalyptic number.

11921534 is a deficient number, since it is larger than the sum of its proper divisors (5960770).

11921534 is an equidigital number, since it uses as much as digits as its factorization.

11921534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960769.

The product of its digits is 1080, while the sum is 26.

The square root of 11921534 is about 3452.7574487647. The cubic root of 11921534 is about 228.4427505260.

The spelling of 11921534 in words is "eleven million, nine hundred twenty-one thousand, five hundred thirty-four".