1215663452 has 12 divisors (see below), whose sum is σ = 2156554176. Its totient is φ = 599505120.

The previous prime is 1215663443. The next prime is 1215663457. The reversal of 1215663452 is 2543665121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215663457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081324 + ... + 2081907.

It is an arithmetic number, because the mean of its divisors is an integer number (179712848).

Almost surely, 2^1215663452 is an apocalyptic number.

It is an amenable number.

1215663452 is a deficient number, since it is larger than the sum of its proper divisors (940890724).

1215663452 is a wasteful number, since it uses less digits than its factorization.

1215663452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163308 (or 4163306 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1215663452 is about 34866.3656264888. The cubic root of 1215663452 is about 1067.2621805304.

The spelling of 1215663452 in words is "one billion, two hundred fifteen million, six hundred sixty-three thousand, four hundred fifty-two".