11281397 has 4 divisors (see below), whose sum is σ = 11393196. Its totient is φ = 11169600.

The previous prime is 11281381. The next prime is 11281399. The reversal of 11281397 is 79318211.

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 6791236 + 4490161 = 2606^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 11281397 - 2⁴ = 11281381 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55748 + ... + 55949.

It is an arithmetic number, because the mean of its divisors is an integer number (2848299).

Almost surely, 2^11281397 is an apocalyptic number.

It is an amenable number.

11281397 is a deficient number, since it is larger than the sum of its proper divisors (111799).

11281397 is a wasteful number, since it uses less digits than its factorization.

11281397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111798.

The product of its digits is 3024, while the sum is 32.

The square root of 11281397 is about 3358.7790936589. The cubic root of 11281397 is about 224.2784921046.

The spelling of 11281397 in words is "eleven million, two hundred eighty-one thousand, three hundred ninety-seven".