1440004125 has 192 divisors, whose sum is σ = 3080802816. Its totient is φ = 582912000.

The previous prime is 1440004109. The next prime is 1440004177. The reversal of 1440004125 is 5214000441.

It is a happy number.

It is not a de Polignac number, because 1440004125 - 2⁴ = 1440004109 is a prime.

It is a super-2 number, since 2×1440004125² = 4147223760034031250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 23606595 + ... + 23606655.

It is an arithmetic number, because the mean of its divisors is an integer number (16045848).

Almost surely, 2^1440004125 is an apocalyptic number.

1440004125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440004125 is an abundant number, since it is smaller than the sum of its proper divisors (1640798691).

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

1440004125 is a wasteful number, since it uses less digits than its factorization.

1440004125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1440004125 is about 37947.3862736289. The cubic root of 1440004125 is about 1129.2443129267.

Adding to 1440004125 its reverse (5214000441), we get a palindrome (6654004566).

The spelling of 1440004125 in words is "one billion, four hundred forty million, four thousand, one hundred twenty-five".