1201619280 has 80 divisors (see below), whose sum is σ = 3921088320. Its totient is φ = 303565824.

The previous prime is 1201619273. The next prime is 1201619281. The reversal of 1201619280 is 829161021.

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 not an unprimeable number, because it can be changed into a prime (1201619281) 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, 127197 + ... + 136316.

It is an arithmetic number, because the mean of its divisors is an integer number (49013604).

Almost surely, 2^1201619280 is an apocalyptic number.

1201619280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201619280 is an abundant number, since it is smaller than the sum of its proper divisors (2719469040).

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

1201619280 is a wasteful number, since it uses less digits than its factorization.

1201619280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263548 (or 263542 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1201619280 is about 34664.3805656469. The cubic root of 1201619280 is about 1063.1363381709.

The spelling of 1201619280 in words is "one billion, two hundred one million, six hundred nineteen thousand, two hundred eighty".