1290039 has 4 divisors (see below), whose sum is σ = 1720056. Its totient is φ = 860024.

The previous prime is 1290031. The next prime is 1290049. The reversal of 1290039 is 9300921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1290039 - 2³ = 1290031 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290031) 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, 215004 + ... + 215009.

It is an arithmetic number, because the mean of its divisors is an integer number (430014).

2^1290039 is an apocalyptic number.

1290039 is a deficient number, since it is larger than the sum of its proper divisors (430017).

1290039 is an equidigital number, since it uses as much as digits as its factorization.

1290039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430016.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1290039 is about 1135.7988378230. The cubic root of 1290039 is about 108.8598203601.

The spelling of 1290039 in words is "one million, two hundred ninety thousand, thirty-nine".