1201187280 has 80 divisors (see below), whose sum is σ = 3727511424. Its totient is φ = 319987200.

The previous prime is 1201187269. The next prime is 1201187321. The reversal of 1201187280 is 827811021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

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, 310317 + ... + 314163.

Almost surely, 2^1201187280 is an apocalyptic number.

1201187280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201187280 is an abundant number, since it is smaller than the sum of its proper divisors (2526324144).

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

1201187280 is a wasteful number, since it uses less digits than its factorization.

1201187280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164 (or 5158 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 1201187280 is about 34658.1488253484. The cubic root of 1201187280 is about 1063.0089184589.

The spelling of 1201187280 in words is "one billion, two hundred one million, one hundred eighty-seven thousand, two hundred eighty".