1425630440 has 32 divisors (see below), whose sum is σ = 3454413480. Its totient is φ = 526386432.

The previous prime is 1425630433. The next prime is 1425630457. The reversal of 1425630440 is 440365241.

It can be written as a sum of positive squares in 4 ways, for example, as 557620996 + 868009444 = 23614^2 + 29462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370279 + ... + 1371318.

Almost surely, 2^1425630440 is an apocalyptic number.

1425630440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1425630440 is an abundant number, since it is smaller than the sum of its proper divisors (2028783040).

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

1425630440 is a wasteful number, since it uses less digits than its factorization.

1425630440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741621 (or 2741617 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1425630440 is about 37757.5216347683. The cubic root of 1425630440 is about 1125.4744836381.

Adding to 1425630440 its reverse (440365241), we get a palindrome (1865995681).

The spelling of 1425630440 in words is "one billion, four hundred twenty-five million, six hundred thirty thousand, four hundred forty".