1421790 has 32 divisors (see below), whose sum is σ = 3459456. Its totient is φ = 373920.

The previous prime is 1421779. The next prime is 1421801. The reversal of 1421790 is 971241.

It is an interprime number because it is at equal distance from previous prime (1421779) and next prime (1421801).

It is a self number, because there is not a number n which added to its sum of digits gives 1421790.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2205 + ... + 2775.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^1421790 is an apocalyptic number.

1421790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421790 is an abundant number, since it is smaller than the sum of its proper divisors (2037666).

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

1421790 is a wasteful number, since it uses less digits than its factorization.

1421790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1421790 is about 1192.3883595541. The cubic root of 1421790 is about 112.4462953545.

It can be divided in two parts, 1421 and 790, that added together give a triangular number (2211 = T₆₆).

The spelling of 1421790 in words is "one million, four hundred twenty-one thousand, seven hundred ninety".