12550381 has 4 divisors (see below), whose sum is σ = 12955264. Its totient is φ = 12145500.

The previous prime is 12550357. The next prime is 12550411. The reversal of 12550381 is 18305521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12550381 - 2¹⁵ = 12517613 is a prime.

It is a super-2 number, since 2×12550381² = 315024126490322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550481) 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, 202395 + ... + 202456.

It is an arithmetic number, because the mean of its divisors is an integer number (3238816).

Almost surely, 2^12550381 is an apocalyptic number.

It is an amenable number.

12550381 is a deficient number, since it is larger than the sum of its proper divisors (404883).

12550381 is an equidigital number, since it uses as much as digits as its factorization.

12550381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404882.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 12550381 is about 3542.6516904714. The cubic root of 12550381 is about 232.3908209014.

The spelling of 12550381 in words is "twelve million, five hundred fifty thousand, three hundred eighty-one".