1824421725 has 240 divisors, whose sum is σ = 4187196288. Its totient is φ = 766402560.

The previous prime is 1824421723. The next prime is 1824421763. The reversal of 1824421725 is 5271244281.

1824421725 is a `hidden beast` number, since 182 + 442 + 17 + 25 = 666.

It is not a de Polignac number, because 1824421725 - 2¹ = 1824421723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1824421725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1824421721) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 16145269 + ... + 16145381.

Almost surely, 2^1824421725 is an apocalyptic number.

1824421725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1824421725 is the 21357-th decagonal number.

It is an amenable number.

1824421725 is an abundant number, since it is smaller than the sum of its proper divisors (2362774563).

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

1824421725 is a wasteful number, since it uses less digits than its factorization.

1824421725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 212 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 1824421725 is about 42713.2499934154. The cubic root of 1824421725 is about 1221.9171070407.

The spelling of 1824421725 in words is "one billion, eight hundred twenty-four million, four hundred twenty-one thousand, seven hundred twenty-five".