1215140455 has 8 divisors (see below), whose sum is σ = 1508450400. Its totient is φ = 938591136.

The previous prime is 1215140453. The next prime is 1215140473. The reversal of 1215140455 is 5540415121.

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

It is a cyclic number.

It is not a de Polignac number, because 1215140455 - 2¹ = 1215140453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215140453) 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, 4189995 + ... + 4190284.

It is an arithmetic number, because the mean of its divisors is an integer number (188556300).

Almost surely, 2^1215140455 is an apocalyptic number.

1215140455 is a deficient number, since it is larger than the sum of its proper divisors (293309945).

1215140455 is an equidigital number, since it uses as much as digits as its factorization.

1215140455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380313.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1215140455 is about 34858.8647979248. The cubic root of 1215140455 is about 1067.1091077420.

Adding to 1215140455 its reverse (5540415121), we get a palindrome (6755555576).

The spelling of 1215140455 in words is "one billion, two hundred fifteen million, one hundred forty thousand, four hundred fifty-five".