1242104135956 has 12 divisors (see below), whose sum is σ = 2201197203520. Its totient is φ = 613190649240.

The previous prime is 1242104135953. The next prime is 1242104135963. The reversal of 1242104135956 is 6595314012421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242104135953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965354330 + ... + 1965354961.

Almost surely, 2^{1242104135956} is an apocalyptic number.

It is an amenable number.

1242104135956 is a deficient number, since it is larger than the sum of its proper divisors (959093067564).

1242104135956 is a wasteful number, since it uses less digits than its factorization.

1242104135956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930709374 (or 3930709372 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1242104135956 in words is "one trillion, two hundred forty-two billion, one hundred four million, one hundred thirty-five thousand, nine hundred fifty-six".