1296390 has 32 divisors (see below), whose sum is σ = 3156480. Its totient is φ = 340704.

The previous prime is 1296371. The next prime is 1296391. The reversal of 1296390 is 936921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296391) 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, 2097 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (98640).

2^1296390 is an apocalyptic number.

1296390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1296390 is an abundant number, since it is smaller than the sum of its proper divisors (1860090).

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

1296390 is a wasteful number, since it uses less digits than its factorization.

1296390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1296390 is about 1138.5912348161. The cubic root of 1296390 is about 109.0381708470.

The spelling of 1296390 in words is "one million, two hundred ninety-six thousand, three hundred ninety".