1425531280 has 80 divisors (see below), whose sum is σ = 3437351424. Its totient is φ = 549227520.

The previous prime is 1425531257. The next prime is 1425531281. The reversal of 1425531280 is 821355241.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (1425531281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576607 + ... + 579073.

Almost surely, 2^1425531280 is an apocalyptic number.

1425531280 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 1425531280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718675712).

1425531280 is an abundant number, since it is smaller than the sum of its proper divisors (2011820144).

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

1425531280 is a wasteful number, since it uses less digits than its factorization.

1425531280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1425531280 is about 37756.2084960871. The cubic root of 1425531280 is about 1125.4483888349.

The spelling of 1425531280 in words is "one billion, four hundred twenty-five million, five hundred thirty-one thousand, two hundred eighty".