11291481 has 18 divisors (see below), whose sum is σ = 16946202. Its totient is φ = 7523280.

The previous prime is 11291473. The next prime is 11291507. The reversal of 11291481 is 18419211.

11291481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 793881 = 3240^2 + 891^2 .

It is not a de Polignac number, because 11291481 - 2³ = 11291473 is a prime.

It is a super-2 number, since 2×11291481² = 254995086346722, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (11291431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5701 + ... + 7421.

Almost surely, 2^11291481 is an apocalyptic number.

It is an amenable number.

11291481 is a deficient number, since it is larger than the sum of its proper divisors (5654721).

11291481 is an frugal number, since it uses more digits than its factorization.

11291481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1724 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 11291481 is about 3360.2798990560. The cubic root of 11291481 is about 224.3452967976.

The spelling of 11291481 in words is "eleven million, two hundred ninety-one thousand, four hundred eighty-one".