1201056780 has 384 divisors, whose sum is σ = 4459069440. Its totient is φ = 234178560.

The previous prime is 1201056767. The next prime is 1201056793. The reversal of 1201056780 is 876501021.

It is an interprime number because it is at equal distance from previous prime (1201056767) and next prime (1201056793).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9457077 + ... + 9457203.

It is an arithmetic number, because the mean of its divisors is an integer number (11612160).

Almost surely, 2^1201056780 is an apocalyptic number.

1201056780 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 1201056780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229534720).

1201056780 is an abundant number, since it is smaller than the sum of its proper divisors (3258012660).

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

1201056780 is a wasteful number, since it uses less digits than its factorization.

1201056780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1201056780 is about 34656.2661000864. The cubic root of 1201056780 is about 1062.9704210794.

The spelling of 1201056780 in words is "one billion, two hundred one million, fifty-six thousand, seven hundred eighty".