11280457 has 4 divisors (see below), whose sum is σ = 11390080. Its totient is φ = 11170836.

The previous prime is 11280439. The next prime is 11280473. The reversal of 11280457 is 75408211.

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 a de Polignac number, because none of the positive numbers 2^k-11280457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11280407) 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, 54657 + ... + 54862.

It is an arithmetic number, because the mean of its divisors is an integer number (2847520).

Almost surely, 2^11280457 is an apocalyptic number.

It is an amenable number.

11280457 is a deficient number, since it is larger than the sum of its proper divisors (109623).

11280457 is a wasteful number, since it uses less digits than its factorization.

11280457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109622.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 11280457 is about 3358.6391589452. The cubic root of 11280457 is about 224.2722627450.

Adding to 11280457 its reverse (75408211), we get a palindrome (86688668).

The spelling of 11280457 in words is "eleven million, two hundred eighty thousand, four hundred fifty-seven".