1245127680 has 176 divisors, whose sum is σ = 4425450240. Its totient is φ = 331997184.

The previous prime is 1245127643. The next prime is 1245127687. The reversal of 1245127680 is 867215421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1245127687) 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, 133737 + ... + 142743.

Almost surely, 2^1245127680 is an apocalyptic number.

1245127680 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 1245127680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212725120).

1245127680 is an abundant number, since it is smaller than the sum of its proper divisors (3180322560).

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

1245127680 is an equidigital number, since it uses as much as digits as its factorization.

1245127680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9041 (or 9017 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1245127680 is about 35286.3667724519. The cubic root of 1245127680 is about 1075.8159098743.

The spelling of 1245127680 in words is "one billion, two hundred forty-five million, one hundred twenty-seven thousand, six hundred eighty".