1249494280 has 64 divisors (see below), whose sum is σ = 2862201600. Its totient is φ = 490821120.

The previous prime is 1249494269. The next prime is 1249494317. The reversal of 1249494280 is 824949421.

It is a super-2 number, since 2×1249494280² = 3122471911505436800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790531 + ... + 792109.

It is an arithmetic number, because the mean of its divisors is an integer number (44721900).

Almost surely, 2^1249494280 is an apocalyptic number.

1249494280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249494280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1431100800).

1249494280 is an abundant number, since it is smaller than the sum of its proper divisors (1612707320).

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

1249494280 is a wasteful number, since it uses less digits than its factorization.

1249494280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1930 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1249494280 is about 35348.1863749754. The cubic root of 1249494280 is about 1077.0720533255.

The spelling of 1249494280 in words is "one billion, two hundred forty-nine million, four hundred ninety-four thousand, two hundred eighty".