1290641 has 4 divisors (see below), whose sum is σ = 1407984. Its totient is φ = 1173300.

The previous prime is 1290637. The next prime is 1290643. The reversal of 1290641 is 1460921.

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.

It is a cyclic number.

It is not a de Polignac number, because 1290641 - 2² = 1290637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290643) 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, 58655 + ... + 58676.

It is an arithmetic number, because the mean of its divisors is an integer number (351996).

2^1290641 is an apocalyptic number.

1290641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1290641 is a deficient number, since it is larger than the sum of its proper divisors (117343).

1290641 is a wasteful number, since it uses less digits than its factorization.

1290641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117342.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1290641 is about 1136.0638186299. The cubic root of 1290641 is about 108.8767509647.

The spelling of 1290641 in words is "one million, two hundred ninety thousand, six hundred forty-one".