1295225920 has 56 divisors (see below), whose sum is σ = 3265697304. Its totient is φ = 487612416.

The previous prime is 1295225917. The next prime is 1295225923. The reversal of 1295225920 is 295225921.

It is an interprime number because it is at equal distance from previous prime (1295225917) and next prime (1295225923).

It can be written as a sum of positive squares in 4 ways, for example, as 336208896 + 959017024 = 18336^2 + 30968^2 .

It is a super-2 number, since 2×1295225920² = 3355220367679692800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1295225920.

It is not an unprimeable number, because it can be changed into a prime (1295225923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113607 + ... + 124486.

Almost surely, 2^1295225920 is an apocalyptic number.

1295225920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1295225920 is an abundant number, since it is smaller than the sum of its proper divisors (1970471384).

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

1295225920 is a wasteful number, since it uses less digits than its factorization.

1295225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238127 (or 238117 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1295225920 is about 35989.2472830428. The cubic root of 1295225920 is about 1090.0552450747.

Subtracting from 1295225920 its reverse (295225921), we obtain a palindrome (999999999).

The spelling of 1295225920 in words is "one billion, two hundred ninety-five million, two hundred twenty-five thousand, nine hundred twenty".