1421490 has 48 divisors (see below), whose sum is σ = 3972672. Its totient is φ = 324576.

The previous prime is 1421479. The next prime is 1421501. The reversal of 1421490 is 941241.

It is an interprime number because it is at equal distance from previous prime (1421479) and next prime (1421501).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 987 + ... + 1953.

It is an arithmetic number, because the mean of its divisors is an integer number (82764).

2^1421490 is an apocalyptic number.

1421490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986336).

1421490 is an abundant number, since it is smaller than the sum of its proper divisors (2551182).

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

1421490 is a wasteful number, since it uses less digits than its factorization.

1421490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1421490 is about 1192.2625549769. The cubic root of 1421490 is about 112.4383860145.

Subtracting from 1421490 its reverse (941241), we obtain a square (480249 = 693²).

The spelling of 1421490 in words is "one million, four hundred twenty-one thousand, four hundred ninety".