1420978 has 32 divisors (see below), whose sum is σ = 2483712. Its totient is φ = 604800.

The previous prime is 1420967. The next prime is 1420981. The reversal of 1420978 is 8790241.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33025 + ... + 33067.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1420978 is an apocalyptic number.

1420978 is a deficient number, since it is larger than the sum of its proper divisors (1062734).

1420978 is a wasteful number, since it uses less digits than its factorization.

1420978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1420978 is about 1192.0478178328. The cubic root of 1420978 is about 112.4248848369.

The spelling of 1420978 in words is "one million, four hundred twenty thousand, nine hundred seventy-eight".