1252783380 has 48 divisors (see below), whose sum is σ = 3714137280. Its totient is φ = 314423808.

The previous prime is 1252783379. The next prime is 1252783381. The reversal of 1252783380 is 833872521.

It is an interprime number because it is at equal distance from previous prime (1252783379) and next prime (1252783381).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252783381) 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, 613090 + ... + 615129.

It is an arithmetic number, because the mean of its divisors is an integer number (77377860).

Almost surely, 2^1252783380 is an apocalyptic number.

1252783380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252783380 is an abundant number, since it is smaller than the sum of its proper divisors (2461353900).

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

1252783380 is a wasteful number, since it uses less digits than its factorization.

1252783380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228248 (or 1228246 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1252783380 is about 35394.6801087395. The cubic root of 1252783380 is about 1078.0163003537.

The spelling of 1252783380 in words is "one billion, two hundred fifty-two million, seven hundred eighty-three thousand, three hundred eighty".