1425280816 has 80 divisors (see below), whose sum is σ = 2990138976. Its totient is φ = 655699968.

The previous prime is 1425280793. The next prime is 1425280817. The reversal of 1425280816 is 6180825241.

It is not an unprimeable number, because it can be changed into a prime (1425280817) 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, 3589930 + ... + 3590326.

Almost surely, 2^1425280816 is an apocalyptic number.

1425280816 is a gapful number since it is divisible by the number (16) 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 1425280816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495069488).

1425280816 is an abundant number, since it is smaller than the sum of its proper divisors (1564858160).

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

1425280816 is a wasteful number, since it uses less digits than its factorization.

1425280816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 1425280816 is about 37752.8914919109. The cubic root of 1425280816 is about 1125.3824716994.

The spelling of 1425280816 in words is "one billion, four hundred twenty-five million, two hundred eighty thousand, eight hundred sixteen".