1264138 has 8 divisors (see below), whose sum is σ = 1901088. Its totient is φ = 630444.

The previous prime is 1264129. The next prime is 1264177. The reversal of 1264138 is 8314621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795 + ... + 1777.

It is an arithmetic number, because the mean of its divisors is an integer number (237636).

2^1264138 is an apocalyptic number.

1264138 is a deficient number, since it is larger than the sum of its proper divisors (636950).

1264138 is an equidigital number, since it uses as much as digits as its factorization.

1264138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its digits is 1152, while the sum is 25.

The square root of 1264138 is about 1124.3389168752. The cubic root of 1264138 is about 108.1263382061.

Adding to 1264138 its reverse (8314621), we get a palindrome (9578759).

The spelling of 1264138 in words is "one million, two hundred sixty-four thousand, one hundred thirty-eight".