1421380 has 12 divisors (see below), whose sum is σ = 2984940. Its totient is φ = 568544.

The previous prime is 1421351. The next prime is 1421389. The reversal of 1421380 is 831241.

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 1272384 = 386^2 + 1128^2 .

It is a super-2 number, since 2×1421380² = 4040642208800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35515 + ... + 35554.

It is an arithmetic number, because the mean of its divisors is an integer number (248745).

2^1421380 is an apocalyptic number.

1421380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421380 is an abundant number, since it is smaller than the sum of its proper divisors (1563560).

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

1421380 is a wasteful number, since it uses less digits than its factorization.

1421380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71078 (or 71076 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1421380 is about 1192.2164233058. The cubic root of 1421380 is about 112.4354856444.

The spelling of 1421380 in words is "one million, four hundred twenty-one thousand, three hundred eighty".