1420660 has 24 divisors (see below), whose sum is σ = 3005856. Its totient is φ = 564000.

The previous prime is 1420651. The next prime is 1420667. The reversal of 1420660 is 660241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420667) 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, 4879 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (125244).

2^1420660 is an apocalyptic number.

1420660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420660 is an abundant number, since it is smaller than the sum of its proper divisors (1585196).

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

1420660 is a wasteful number, since it uses less digits than its factorization.

1420660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1420660 is about 1191.9144264585. The cubic root of 1420660 is about 112.4164977072.

It can be divided in two parts, 1420 and 660, that added together give a triangular number (2080 = T₆₄).

The spelling of 1420660 in words is "one million, four hundred twenty thousand, six hundred sixty".