1249500980 has 96 divisors (see below), whose sum is σ = 3295622400. Its totient is φ = 395418240.

The previous prime is 1249500979. The next prime is 1249500983. The reversal of 1249500980 is 890059421.

It is a super-2 number, since 2×1249500980² = 3122505398041920800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249500983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82175 + ... + 96185.

It is an arithmetic number, because the mean of its divisors is an integer number (34329400).

Almost surely, 2^1249500980 is an apocalyptic number.

1249500980 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 1249500980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647811200).

1249500980 is an abundant number, since it is smaller than the sum of its proper divisors (2046121420).

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

1249500980 is a wasteful number, since it uses less digits than its factorization.

1249500980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14054 (or 14038 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1249500980 is about 35348.2811463302. The cubic root of 1249500980 is about 1077.0739784696.

The spelling of 1249500980 in words is "one billion, two hundred forty-nine million, five hundred thousand, nine hundred eighty".