1425645 has 24 divisors (see below), whose sum is σ = 2662296. Its totient is φ = 701568.

The previous prime is 1425629. The next prime is 1425649. The reversal of 1425645 is 5465241.

1425645 is a `hidden beast` number, since 14 + 2 + 5 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 213444 + 1212201 = 462^2 + 1101^2 .

It is not a de Polignac number, because 1425645 - 2⁴ = 1425629 is a prime.

It is a super-3 number, since 3×1425645³ = 8692714989450633375, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425649) 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 23 ways as a sum of consecutive naturals, for example, 634 + ... + 1803.

It is an arithmetic number, because the mean of its divisors is an integer number (110929).

2^1425645 is an apocalyptic number.

1425645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1425645 is a deficient number, since it is larger than the sum of its proper divisors (1236651).

1425645 is a wasteful number, since it uses less digits than its factorization.

1425645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461 (or 2458 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1425645 is about 1194.0037688383. The cubic root of 1425645 is about 112.5478315125.

The spelling of 1425645 in words is "one million, four hundred twenty-five thousand, six hundred forty-five".