1215455405425 has 24 divisors (see below), whose sum is σ = 1539070109280. Its totient is φ = 951916972800.

The previous prime is 1215455405387. The next prime is 1215455405459. The reversal of 1215455405425 is 5245045545121.

It is not a de Polignac number, because 1215455405425 - 2⁹ = 1215455404913 is a prime.

It is a super-2 number, since 2×1215455405425² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1354147 + ... + 2065096.

It is an arithmetic number, because the mean of its divisors is an integer number (64127921220).

Almost surely, 2^{1215455405425} is an apocalyptic number.

It is an amenable number.

1215455405425 is a deficient number, since it is larger than the sum of its proper divisors (323614703855).

1215455405425 is a wasteful number, since it uses less digits than its factorization.

1215455405425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419553 (or 3419548 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 43.

The spelling of 1215455405425 in words is "one trillion, two hundred fifteen billion, four hundred fifty-five million, four hundred five thousand, four hundred twenty-five".