11156397 has 16 divisors (see below), whose sum is σ = 17060352. Its totient is φ = 6352560.

The previous prime is 11156381. The next prime is 11156399. The reversal of 11156397 is 79365111.

It is a happy number.

It is not a de Polignac number, because 11156397 - 2⁴ = 11156381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6522 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (1066272).

Almost surely, 2^11156397 is an apocalyptic number.

It is an amenable number.

11156397 is a deficient number, since it is larger than the sum of its proper divisors (5903955).

11156397 is a wasteful number, since it uses less digits than its factorization.

11156397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its digits is 5670, while the sum is 33.

The square root of 11156397 is about 3340.1193092463. The cubic root of 11156397 is about 223.4470644218.

The spelling of 11156397 in words is "eleven million, one hundred fifty-six thousand, three hundred ninety-seven".