1201131564 has 24 divisors (see below), whose sum is σ = 2814885360. Its totient is φ = 398627904.

The previous prime is 1201131551. The next prime is 1201131587. The reversal of 1201131564 is 4651311021.

It is a happy number.

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, 215799 + ... + 221294.

It is an arithmetic number, because the mean of its divisors is an integer number (117286890).

Almost surely, 2^1201131564 is an apocalyptic number.

It is an amenable number.

1201131564 is an abundant number, since it is smaller than the sum of its proper divisors (1613753796).

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

1201131564 is a wasteful number, since it uses less digits than its factorization.

1201131564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437329 (or 437327 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1201131564 is about 34657.3450223758. The cubic root of 1201131564 is about 1062.9924826315.

Adding to 1201131564 its reverse (4651311021), we get a palindrome (5852442585).

The spelling of 1201131564 in words is "one billion, two hundred one million, one hundred thirty-one thousand, five hundred sixty-four".