1215402133 has 8 divisors (see below), whose sum is σ = 1383541056. Its totient is φ = 1056871200.

The previous prime is 1215402113. The next prime is 1215402191. The reversal of 1215402133 is 3312045121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1215402133 - 2⁵ = 1215402101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215402113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2401728 + ... + 2402233.

It is an arithmetic number, because the mean of its divisors is an integer number (172942632).

Almost surely, 2^1215402133 is an apocalyptic number.

It is an amenable number.

1215402133 is a deficient number, since it is larger than the sum of its proper divisors (168138923).

1215402133 is a wasteful number, since it uses less digits than its factorization.

1215402133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803995.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1215402133 is about 34862.6179883267. The cubic root of 1215402133 is about 1067.1857021620.

Adding to 1215402133 its reverse (3312045121), we get a palindrome (4527447254).

The spelling of 1215402133 in words is "one billion, two hundred fifteen million, four hundred two thousand, one hundred thirty-three".