11621385 has 12 divisors (see below), whose sum is σ = 20143812. Its totient is φ = 6198048.

The previous prime is 11621383. The next prime is 11621399. The reversal of 11621385 is 58312611.

11621385 is a `hidden beast` number, since 1 + 1 + 621 + 38 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5875776 + 5745609 = 2424^2 + 2397^2 .

It is not a de Polignac number, because 11621385 - 2¹ = 11621383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11621383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129082 + ... + 129171.

It is an arithmetic number, because the mean of its divisors is an integer number (1678651).

Almost surely, 2^11621385 is an apocalyptic number.

11621385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11621385 is a deficient number, since it is larger than the sum of its proper divisors (8522427).

11621385 is a wasteful number, since it uses less digits than its factorization.

11621385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258264 (or 258261 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11621385 is about 3409.0152537060. The cubic root of 11621385 is about 226.5092609111.

Adding to 11621385 its reverse (58312611), we get a palindrome (69933996).

The spelling of 11621385 in words is "eleven million, six hundred twenty-one thousand, three hundred eighty-five".