1215340405442 has 8 divisors (see below), whose sum is σ = 1823019200256. Its totient is φ = 607667338692.

The previous prime is 1215340405427. The next prime is 1215340405463. The reversal of 1215340405442 is 2445040435121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 855098 + ... + 1778165.

It is an arithmetic number, because the mean of its divisors is an integer number (227877400032).

Almost surely, 2^{1215340405442} is an apocalyptic number.

1215340405442 is a deficient number, since it is larger than the sum of its proper divisors (607678794814).

1215340405442 is a wasteful number, since it uses less digits than its factorization.

1215340405442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864032.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 1215340405442 in words is "one trillion, two hundred fifteen billion, three hundred forty million, four hundred five thousand, four hundred forty-two".