1245455980 has 48 divisors (see below), whose sum is σ = 2750791680. Its totient is φ = 472747968.

The previous prime is 1245455977. The next prime is 1245456013. The reversal of 1245455980 is 895545421.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47761 + ... + 69079.

It is an arithmetic number, because the mean of its divisors is an integer number (57308160).

Almost surely, 2^1245455980 is an apocalyptic number.

1245455980 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 1245455980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375395840).

1245455980 is an abundant number, since it is smaller than the sum of its proper divisors (1505335700).

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

1245455980 is a wasteful number, since it uses less digits than its factorization.

1245455980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21478 (or 21476 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The square root of 1245455980 is about 35291.0184041209. The cubic root of 1245455980 is about 1075.9104542149.

The spelling of 1245455980 in words is "one billion, two hundred forty-five million, four hundred fifty-five thousand, nine hundred eighty".