1215450453 has 32 divisors (see below), whose sum is σ = 1902055680. Its totient is φ = 675901440.

The previous prime is 1215450451. The next prime is 1215450461. The reversal of 1215450453 is 3540545121.

It is not a de Polignac number, because 1215450453 - 2¹ = 1215450451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215450453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215450451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391933 + ... + 395021.

It is an arithmetic number, because the mean of its divisors is an integer number (59439240).

Almost surely, 2^1215450453 is an apocalyptic number.

It is an amenable number.

1215450453 is a deficient number, since it is larger than the sum of its proper divisors (686605227).

1215450453 is a wasteful number, since it uses less digits than its factorization.

1215450453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1215450453 is about 34863.3109873403. The cubic root of 1215450453 is about 1067.1998444579.

Adding to 1215450453 its reverse (3540545121), we get a palindrome (4755995574).

The spelling of 1215450453 in words is "one billion, two hundred fifteen million, four hundred fifty thousand, four hundred fifty-three".