11380257 has 20 divisors (see below), whose sum is σ = 19429696. Its totient is φ = 6502680.

The previous prime is 11380253. The next prime is 11380277. The reversal of 11380257 is 75208311.

It is not a de Polignac number, because 11380257 - 2² = 11380253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 11380257.

It is not an unprimeable number, because it can be changed into a prime (11380253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9469 + ... + 10602.

Almost surely, 2^11380257 is an apocalyptic number.

It is an amenable number.

11380257 is a deficient number, since it is larger than the sum of its proper divisors (8049439).

11380257 is an equidigital number, since it uses as much as digits as its factorization.

11380257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20090 (or 20081 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 11380257 is about 3373.4636503155. The cubic root of 11380257 is about 224.9317126102.

Adding to 11380257 its reverse (75208311), we get a palindrome (86588568).

The spelling of 11380257 in words is "eleven million, three hundred eighty thousand, two hundred fifty-seven".