11425781 has 4 divisors (see below), whose sum is σ = 11532672. Its totient is φ = 11318892.

The previous prime is 11425759. The next prime is 11425787. The reversal of 11425781 is 18752411.

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-11425781 is a prime.

It is a super-2 number, since 2×11425781² = 261096942919922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11425787) 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, 53285 + ... + 53498.

It is an arithmetic number, because the mean of its divisors is an integer number (2883168).

Almost surely, 2^11425781 is an apocalyptic number.

It is an amenable number.

11425781 is a deficient number, since it is larger than the sum of its proper divisors (106891).

11425781 is a wasteful number, since it uses less digits than its factorization.

11425781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106890.

The product of its digits is 2240, while the sum is 29.

The square root of 11425781 is about 3380.2042837675. The cubic root of 11425781 is about 225.2312420966.

The spelling of 11425781 in words is "eleven million, four hundred twenty-five thousand, seven hundred eighty-one".