11621138 has 8 divisors (see below), whose sum is σ = 17677440. Its totient is φ = 5728660.

The previous prime is 11621131. The next prime is 11621143. The reversal of 11621138 is 83112611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×11621138³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11621131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40778 + ... + 41061.

It is an arithmetic number, because the mean of its divisors is an integer number (2209680).

Almost surely, 2^11621138 is an apocalyptic number.

11621138 is a deficient number, since it is larger than the sum of its proper divisors (6056302).

11621138 is an equidigital number, since it uses as much as digits as its factorization.

11621138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81912.

The product of its digits is 288, while the sum is 23.

The square root of 11621138 is about 3408.9790260428. The cubic root of 11621138 is about 226.5076561630.

Adding to 11621138 its reverse (83112611), we get a palindrome (94733749).

The spelling of 11621138 in words is "eleven million, six hundred twenty-one thousand, one hundred thirty-eight".