11387421 has 12 divisors (see below), whose sum is σ = 16759548. Its totient is φ = 7448064.

The previous prime is 11387359. The next prime is 11387423. The reversal of 11387421 is 12478311.

11387421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4575321 + 6812100 = 2139^2 + 2610^2 .

It is not a de Polignac number, because 11387421 - 2⁷ = 11387293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11387423) 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, 11460 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (1396629).

Almost surely, 2^11387421 is an apocalyptic number.

It is an amenable number.

11387421 is a deficient number, since it is larger than the sum of its proper divisors (5372127).

11387421 is a wasteful number, since it uses less digits than its factorization.

11387421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23932 (or 23929 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11387421 is about 3374.5252999496. The cubic root of 11387421 is about 224.9789017254.

The spelling of 11387421 in words is "eleven million, three hundred eighty-seven thousand, four hundred twenty-one".