11257789 has 4 divisors (see below), whose sum is σ = 11270556. Its totient is φ = 11245024.

The previous prime is 11257781. The next prime is 11257793. The reversal of 11257789 is 98775211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4549689 + 6708100 = 2133^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 11257789 - 2³ = 11257781 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11257781) 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, 4954 + ... + 6859.

It is an arithmetic number, because the mean of its divisors is an integer number (2817639).

Almost surely, 2^11257789 is an apocalyptic number.

It is an amenable number.

11257789 is a deficient number, since it is larger than the sum of its proper divisors (12767).

11257789 is an equidigital number, since it uses as much as digits as its factorization.

11257789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12766.

The product of its digits is 35280, while the sum is 40.

The square root of 11257789 is about 3355.2628809081. The cubic root of 11257789 is about 224.1219374893.

The spelling of 11257789 in words is "eleven million, two hundred fifty-seven thousand, seven hundred eighty-nine".