1425424 has 80 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 506880.

The previous prime is 1425371. The next prime is 1425427. The reversal of 1425424 is 4245241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

1425424 is a Rhonda number in base 10.

Its product of digits (1280) is a multiple of the sum of its prime factors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1425395 and 1425404.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15972 + ... + 16060.

It is an arithmetic number, because the mean of its divisors is an integer number (46872).

2^1425424 is an apocalyptic number.

1425424 is a gapful number since it is divisible by the number (14) 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 1425424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874880).

1425424 is an abundant number, since it is smaller than the sum of its proper divisors (2324336).

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

1425424 is a wasteful number, since it uses less digits than its factorization.

1425424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 122 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 1425424 is about 1193.9112194799. The cubic root of 1425424 is about 112.5420155821.

It can be divided in two parts, 1425 and 424, that added together give a square (1849 = 43²).

The spelling of 1425424 in words is "one million, four hundred twenty-five thousand, four hundred twenty-four".