1425780 has 54 divisors (see below), whose sum is σ = 4374006. Its totient is φ = 375936.

The previous prime is 1425769. The next prime is 1425791. The reversal of 1425780 is 875241.

It is an interprime number because it is at equal distance from previous prime (1425769) and next prime (1425791).

It can be written as a sum of positive squares in 3 ways, for example, as 144 + 1425636 = 12^2 + 1194^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15976 + ... + 16064.

2^1425780 is an apocalyptic number.

1425780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1425780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2187003).

1425780 is an abundant number, since it is smaller than the sum of its proper divisors (2948226).

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

1425780 is a wasteful number, since it uses less digits than its factorization.

1425780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1425780 is about 1194.0602999849. The cubic root of 1425780 is about 112.5513839344.

The spelling of 1425780 in words is "one million, four hundred twenty-five thousand, seven hundred eighty".