1242256047 has 8 divisors (see below), whose sum is σ = 1656708480. Its totient is φ = 827987160.

The previous prime is 1242256039. The next prime is 1242256051. The reversal of 1242256047 is 7406522421.

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

It is not a de Polignac number, because 1242256047 - 2³ = 1242256039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242255999 and 1242256017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242256027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29229 + ... + 57782.

It is an arithmetic number, because the mean of its divisors is an integer number (207088560).

Almost surely, 2^1242256047 is an apocalyptic number.

1242256047 is a deficient number, since it is larger than the sum of its proper divisors (414452433).

1242256047 is an equidigital number, since it uses as much as digits as its factorization.

1242256047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91773.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 1242256047 is about 35245.6528808873. The cubic root of 1242256047 is about 1074.9882232710.

Adding to 1242256047 its reverse (7406522421), we get a palindrome (8648778468).

The spelling of 1242256047 in words is "one billion, two hundred forty-two million, two hundred fifty-six thousand, forty-seven".