11642257 has 8 divisors (see below), whose sum is σ = 12807072. Its totient is φ = 10582660.

The previous prime is 11642249. The next prime is 11642261. The reversal of 11642257 is 75224611.

It is not a de Polignac number, because 11642257 - 2³ = 11642249 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (11642287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3043 + ... + 5704.

It is an arithmetic number, because the mean of its divisors is an integer number (1600884).

Almost surely, 2^11642257 is an apocalyptic number.

It is an amenable number.

11642257 is a deficient number, since it is larger than the sum of its proper divisors (1164815).

11642257 is an frugal number, since it uses more digits than its factorization.

11642257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8780 (or 8758 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 11642257 is about 3412.0751750218. The cubic root of 11642257 is about 226.6447833064.

Adding to 11642257 its reverse (75224611), we get a palindrome (86866868).

The spelling of 11642257 in words is "eleven million, six hundred forty-two thousand, two hundred fifty-seven".