1213253015 has 8 divisors (see below), whose sum is σ = 1567896288. Its totient is φ = 895940640.

The previous prime is 1213252993. The next prime is 1213253023. The reversal of 1213253015 is 5103523121.

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 1213253015 - 2¹⁴ = 1213236631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9332651 + ... + 9332780.

It is an arithmetic number, because the mean of its divisors is an integer number (195987036).

Almost surely, 2^1213253015 is an apocalyptic number.

1213253015 is a deficient number, since it is larger than the sum of its proper divisors (354643273).

1213253015 is a wasteful number, since it uses less digits than its factorization.

1213253015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18665449.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1213253015 is about 34831.7816799543. The cubic root of 1213253015 is about 1066.5563189342.

Adding to 1213253015 its reverse (5103523121), we get a palindrome (6316776136).

The spelling of 1213253015 in words is "one billion, two hundred thirteen million, two hundred fifty-three thousand, fifteen".