1215134250 has 64 divisors (see below), whose sum is σ = 3308722560. Its totient is φ = 294576000.

The previous prime is 1215134243. The next prime is 1215134267. The reversal of 1215134250 is 524315121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215134250.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65395 + ... + 81894.

It is an arithmetic number, because the mean of its divisors is an integer number (51698790).

Almost surely, 2^1215134250 is an apocalyptic number.

1215134250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215134250 is an abundant number, since it is smaller than the sum of its proper divisors (2093588310).

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

1215134250 is a wasteful number, since it uses less digits than its factorization.

1215134250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147320 (or 147310 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1215134250 is about 34858.7757960603. The cubic root of 1215134250 is about 1067.1072913750.

Adding to 1215134250 its reverse (524315121), we get a palindrome (1739449371).

The spelling of 1215134250 in words is "one billion, two hundred fifteen million, one hundred thirty-four thousand, two hundred fifty".