1139857 has 4 divisors (see below), whose sum is σ = 1189440. Its totient is φ = 1090276.

The previous prime is 1139851. The next prime is 1139861. The reversal of 1139857 is 7589311.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7589311 = 313 ⋅24247.

It is a cyclic number.

It is not a de Polignac number, because 1139857 - 2³ = 1139849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139851) 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, 24757 + ... + 24802.

It is an arithmetic number, because the mean of its divisors is an integer number (297360).

2^1139857 is an apocalyptic number.

It is an amenable number.

1139857 is a deficient number, since it is larger than the sum of its proper divisors (49583).

1139857 is an equidigital number, since it uses as much as digits as its factorization.

1139857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49582.

The product of its digits is 7560, while the sum is 34.

The square root of 1139857 is about 1067.6408572174. The cubic root of 1139857 is about 104.4600245440.

The spelling of 1139857 in words is "one million, one hundred thirty-nine thousand, eight hundred fifty-seven".