1213405425515 has 4 divisors (see below), whose sum is σ = 1456086510624. Its totient is φ = 970724340408.

The previous prime is 1213405425487. The next prime is 1213405425541. The reversal of 1213405425515 is 5155245043121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213405425515 - 2¹⁴ = 1213405409131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121340542547 + ... + 121340542556.

It is an arithmetic number, because the mean of its divisors is an integer number (364021627656).

Almost surely, 2^{1213405425515} is an apocalyptic number.

1213405425515 is a deficient number, since it is larger than the sum of its proper divisors (242681085109).

1213405425515 is an equidigital number, since it uses as much as digits as its factorization.

1213405425515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242681085108.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 1213405425515 in words is "one trillion, two hundred thirteen billion, four hundred five million, four hundred twenty-five thousand, five hundred fifteen".