1425999 has 4 divisors (see below), whose sum is σ = 1901336. Its totient is φ = 950664.

The previous prime is 1425973. The next prime is 1426003. The reversal of 1425999 is 9995241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9995241 = 3 ⋅3331747.

It is not a de Polignac number, because 1425999 - 2⁵ = 1425967 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237664 + ... + 237669.

It is an arithmetic number, because the mean of its divisors is an integer number (475334).

2^1425999 is an apocalyptic number.

1425999 is a deficient number, since it is larger than the sum of its proper divisors (475337).

1425999 is an equidigital number, since it uses as much as digits as its factorization.

1425999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475336.

The product of its digits is 29160, while the sum is 39.

The square root of 1425999 is about 1194.1520003752. The cubic root of 1425999 is about 112.5571462753.

The spelling of 1425999 in words is "one million, four hundred twenty-five thousand, nine hundred ninety-nine".