1425420 has 36 divisors (see below), whose sum is σ = 4324320. Its totient is φ = 380064.

The previous prime is 1425371. The next prime is 1425427. The reversal of 1425420 is 245241.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1425393 and 1425402.

It is not an unprimeable number, because it can be changed into a prime (1425427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3780 + ... + 4139.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2^1425420 is an apocalyptic number.

1425420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1425420 is an abundant number, since it is smaller than the sum of its proper divisors (2898900).

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

1425420 is a wasteful number, since it uses less digits than its factorization.

1425420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1425420 is about 1193.9095443123. The cubic root of 1425420 is about 112.5419103109.

The spelling of 1425420 in words is "one million, four hundred twenty-five thousand, four hundred twenty".