1428425 has 12 divisors (see below), whose sum is σ = 1875996. Its totient is φ = 1075200.

The previous prime is 1428419. The next prime is 1428431. The reversal of 1428425 is 5248241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1428419) and next prime (1428431).

It can be written as a sum of positive squares in 6 ways, for example, as 26569 + 1401856 = 163^2 + 1184^2 .

It is not a de Polignac number, because 1428425 - 2⁴ = 1428409 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428394 and 1428403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1256 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (156333).

2^1428425 is an apocalyptic number.

It is an amenable number.

1428425 is a deficient number, since it is larger than the sum of its proper divisors (447571).

1428425 is a wasteful number, since it uses less digits than its factorization.

1428425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388 (or 3383 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 1428425 is about 1195.1673522984. The cubic root of 1428425 is about 112.6209398993.

The spelling of 1428425 in words is "one million, four hundred twenty-eight thousand, four hundred twenty-five".