1213629242405 has 4 divisors (see below), whose sum is σ = 1456355090892. Its totient is φ = 970903393920.

The previous prime is 1213629242387. The next prime is 1213629242443. The reversal of 1213629242405 is 5042429263121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 957333092356 + 256296150049 = 978434^2 + 506257^2 .

It is not a de Polignac number, because 1213629242405 - 2¹⁰ = 1213629241381 is a prime.

It is a Duffinian number.

It is a congruent 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, 121362924236 + ... + 121362924245.

It is an arithmetic number, because the mean of its divisors is an integer number (364088772723).

Almost surely, 2^{1213629242405} is an apocalyptic number.

It is an amenable number.

1213629242405 is a deficient number, since it is larger than the sum of its proper divisors (242725848487).

1213629242405 is an equidigital number, since it uses as much as digits as its factorization.

1213629242405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242725848486.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 1213629242405 in words is "one trillion, two hundred thirteen billion, six hundred twenty-nine million, two hundred forty-two thousand, four hundred five".