1213504652 has 24 divisors (see below), whose sum is σ = 2201475360. Its totient is φ = 584599680.

The previous prime is 1213504639. The next prime is 1213504741. The reversal of 1213504652 is 2564053121.

It is a super-2 number, since 2×1213504652² = 2945187080851282208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 45752 + ... + 67232.

It is an arithmetic number, because the mean of its divisors is an integer number (91728140).

Almost surely, 2^1213504652 is an apocalyptic number.

It is an amenable number.

1213504652 is a deficient number, since it is larger than the sum of its proper divisors (987970708).

1213504652 is a wasteful number, since it uses less digits than its factorization.

1213504652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22001 (or 21999 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1213504652 is about 34835.3936679349. The cubic root of 1213504652 is about 1066.6300508698.

Adding to 1213504652 its reverse (2564053121), we get a palindrome (3777557773).

The spelling of 1213504652 in words is "one billion, two hundred thirteen million, five hundred four thousand, six hundred fifty-two".