1421680 has 40 divisors (see below), whose sum is σ = 3562272. Its totient is φ = 524544.

The previous prime is 1421677. The next prime is 1421689. The reversal of 1421680 is 861241.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357 + ... + 1723.

2^1421680 is an apocalyptic number.

1421680 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 1421680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781136).

1421680 is an abundant number, since it is smaller than the sum of its proper divisors (2140592).

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

1421680 is a wasteful number, since it uses less digits than its factorization.

1421680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1421680 is about 1192.3422327503. The cubic root of 1421680 is about 112.4433953924.

The spelling of 1421680 in words is "one million, four hundred twenty-one thousand, six hundred eighty".