1201504656 has 80 divisors (see below), whose sum is σ = 3392282880. Its totient is φ = 363423360.

The previous prime is 1201504643. The next prime is 1201504673. The reversal of 1201504656 is 6564051021.

It is a super-2 number, since 2×1201504656² = 2887226876779356672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337735 + ... + 341273.

It is an arithmetic number, because the mean of its divisors is an integer number (42403536).

Almost surely, 2^1201504656 is an apocalyptic number.

1201504656 is a gapful number since it is divisible by the number (16) 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 1201504656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1696141440).

1201504656 is an abundant number, since it is smaller than the sum of its proper divisors (2190778224).

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

1201504656 is a wasteful number, since it uses less digits than its factorization.

1201504656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1201504656 is about 34662.7271864174. The cubic root of 1201504656 is about 1063.1025324510.

Adding to 1201504656 its reverse (6564051021), we get a palindrome (7765555677).

The spelling of 1201504656 in words is "one billion, two hundred one million, five hundred four thousand, six hundred fifty-six".