1296138 has 8 divisors (see below), whose sum is σ = 2592288. Its totient is φ = 432044.

The previous prime is 1296137. The next prime is 1296143. The reversal of 1296138 is 8316921.

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

1296138 is an admirable number.

It is a super-3 number, since 3×1296138³ = 6532433313209100216, which contains 333 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1296137) 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, 108006 + ... + 108017.

It is an arithmetic number, because the mean of its divisors is an integer number (324036).

2^1296138 is an apocalyptic number.

1296138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296138 is a wasteful number, since it uses less digits than its factorization.

1296138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216028.

The product of its digits is 2592, while the sum is 30.

The square root of 1296138 is about 1138.4805663691. The cubic root of 1296138 is about 109.0311052264.

The spelling of 1296138 in words is "one million, two hundred ninety-six thousand, one hundred thirty-eight".