1421760 has 56 divisors (see below), whose sum is σ = 4517136. Its totient is φ = 378880.

The previous prime is 1421759. The next prime is 1421773. The reversal of 1421760 is 671241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 1700.

2^1421760 is an apocalyptic number.

1421760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2258568).

1421760 is an abundant number, since it is smaller than the sum of its proper divisors (3095376).

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

1421760 is a wasteful number, since it uses less digits than its factorization.

1421760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1421760 is about 1192.3757796936. The cubic root of 1421760 is about 112.4455044706.

The spelling of 1421760 in words is "one million, four hundred twenty-one thousand, seven hundred sixty".