1249332280 has 32 divisors (see below), whose sum is σ = 3212569440. Its totient is φ = 428342400.

The previous prime is 1249332241. The next prime is 1249332281. The reversal of 1249332280 is 822339421.

It is a happy number.

It is a super-2 number, since 2×1249332280² = 3121662291699996800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249332281) 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, 2230671 + ... + 2231230.

It is an arithmetic number, because the mean of its divisors is an integer number (100392795).

Almost surely, 2^1249332280 is an apocalyptic number.

1249332280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1249332280 is an abundant number, since it is smaller than the sum of its proper divisors (1963237160).

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

1249332280 is a wasteful number, since it uses less digits than its factorization.

1249332280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461919 (or 4461915 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1249332280 is about 35345.8948111375. The cubic root of 1249332280 is about 1077.0255029686.

The spelling of 1249332280 in words is "one billion, two hundred forty-nine million, three hundred thirty-two thousand, two hundred eighty".