1425003840 has 280 divisors, whose sum is σ = 5460202440. Its totient is φ = 350687232.

The previous prime is 1425003821. The next prime is 1425003863. The reversal of 1425003840 is 483005241.

It can be written as a sum of positive squares in 4 ways, for example, as 313714944 + 1111288896 = 17712^2 + 33336^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 334846 + ... + 339074.

It is an arithmetic number, because the mean of its divisors is an integer number (19500723).

Almost surely, 2^1425003840 is an apocalyptic number.

1425003840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1425003840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730101220).

1425003840 is an abundant number, since it is smaller than the sum of its proper divisors (4035198600).

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

1425003840 is a wasteful number, since it uses less digits than its factorization.

1425003840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271 (or 4252 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1425003840 is about 37749.2230383620. The cubic root of 1425003840 is about 1125.3095681411.

The spelling of 1425003840 in words is "one billion, four hundred twenty-five million, three thousand, eight hundred forty".