1253797280 has 48 divisors (see below), whose sum is σ = 2964271464. Its totient is φ = 501150720.

The previous prime is 1253797273. The next prime is 1253797283. The reversal of 1253797280 is 827973521.

It is a Cunningham number, because it is equal to 35409²-1.

It can be written as a sum of positive squares in 4 ways, for example, as 1224160144 + 29637136 = 34988^2 + 5444^2 .

It is not an unprimeable number, because it can be changed into a prime (1253797283) 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, 352310 + ... + 355850.

Almost surely, 2^1253797280 is an apocalyptic number.

1253797280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253797280 is an abundant number, since it is smaller than the sum of its proper divisors (1710474184).

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

1253797280 is a wasteful number, since it uses less digits than its factorization.

1253797280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5769 (or 5761 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1253797280 is about 35408.9999858793. Note that the first 4 decimals coincide. The cubic root of 1253797280 is about 1078.3070412259.

The spelling of 1253797280 in words is "one billion, two hundred fifty-three million, seven hundred ninety-seven thousand, two hundred eighty".