11921385 has 16 divisors (see below), whose sum is σ = 21799296. Its totient is φ = 5449728.

The previous prime is 11921381. The next prime is 11921389. The reversal of 11921385 is 58312911.

It is an interprime number because it is at equal distance from previous prime (11921381) and next prime (11921389).

It is not a de Polignac number, because 11921385 - 2² = 11921381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11921381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56664 + ... + 56873.

It is an arithmetic number, because the mean of its divisors is an integer number (1362456).

Almost surely, 2^11921385 is an apocalyptic number.

11921385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11921385 is a deficient number, since it is larger than the sum of its proper divisors (9877911).

11921385 is a wasteful number, since it uses less digits than its factorization.

11921385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113552.

The product of its digits is 2160, while the sum is 30.

The square root of 11921385 is about 3452.7358717400. The cubic root of 11921385 is about 228.4417987998.

The spelling of 11921385 in words is "eleven million, nine hundred twenty-one thousand, three hundred eighty-five".