11421387 has 6 divisors (see below), whose sum is σ = 16497572. Its totient is φ = 7614252.

The previous prime is 11421379. The next prime is 11421401. The reversal of 11421387 is 78312411.

It is not a de Polignac number, because 11421387 - 2³ = 11421379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11421387.

It is not an unprimeable number, because it can be changed into a prime (11421367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 634513 + ... + 634530.

Almost surely, 2^11421387 is an apocalyptic number.

11421387 is a deficient number, since it is larger than the sum of its proper divisors (5076185).

11421387 is a wasteful number, since it uses less digits than its factorization.

11421387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269049 (or 1269046 counting only the distinct ones).

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

The square root of 11421387 is about 3379.5542605498. The cubic root of 11421387 is about 225.2023660845.

Adding to 11421387 its reverse (78312411), we get a palindrome (89733798).

The spelling of 11421387 in words is "eleven million, four hundred twenty-one thousand, three hundred eighty-seven".