1290422 has 8 divisors (see below), whose sum is σ = 2212176. Its totient is φ = 553032.

The previous prime is 1290379. The next prime is 1290427. The reversal of 1290422 is 2240921.

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

It is a pancake number, because a pancake can be divided into 1290422 parts by 1606 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 1290394 and 1290403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46073 + ... + 46100.

It is an arithmetic number, because the mean of its divisors is an integer number (276522).

2^1290422 is an apocalyptic number.

1290422 is a deficient number, since it is larger than the sum of its proper divisors (921754).

1290422 is an equidigital number, since it uses as much as digits as its factorization.

1290422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92182.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1290422 is about 1135.9674291105. The cubic root of 1290422 is about 108.8705924339.

The spelling of 1290422 in words is "one million, two hundred ninety thousand, four hundred twenty-two".