1201436720 has 40 divisors (see below), whose sum is σ = 3047282640. Its totient is φ = 436885760.

The previous prime is 1201436683. The next prime is 1201436741. The reversal of 1201436720 is 276341021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1201436720.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681755 + ... + 683514.

It is an arithmetic number, because the mean of its divisors is an integer number (76182066).

Almost surely, 2^1201436720 is an apocalyptic number.

1201436720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201436720 is an abundant number, since it is smaller than the sum of its proper divisors (1845845920).

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

1201436720 is a wasteful number, since it uses less digits than its factorization.

1201436720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365293 (or 1365287 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1201436720 is about 34661.7472150496. The cubic root of 1201436720 is about 1063.0824952710.

Adding to 1201436720 its reverse (276341021), we get a palindrome (1477777741).

The spelling of 1201436720 in words is "one billion, two hundred one million, four hundred thirty-six thousand, seven hundred twenty".