1420661 has 12 divisors (see below), whose sum is σ = 1596000. Its totient is φ = 1263240.

The previous prime is 1420651. The next prime is 1420667. The reversal of 1420661 is 1660241.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1420661 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7040 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (133000).

2^1420661 is an apocalyptic number.

1420661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1420661 is a deficient number, since it is larger than the sum of its proper divisors (175339).

1420661 is a wasteful number, since it uses less digits than its factorization.

1420661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1420661 is about 1191.9148459517. The cubic root of 1420661 is about 112.4165240837.

The spelling of 1420661 in words is "one million, four hundred twenty thousand, six hundred sixty-one".