1242476887 has 4 divisors (see below), whose sum is σ = 1245360096. Its totient is φ = 1239593680.

The previous prime is 1242476881. The next prime is 1242476903. The reversal of 1242476887 is 7886742421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7886742421 = 4079 ⋅1933499.

It is a cyclic number.

It is not a de Polignac number, because 1242476887 - 2²³ = 1234088279 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242476887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242476881) 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, 1440958 + ... + 1441819.

It is an arithmetic number, because the mean of its divisors is an integer number (311340024).

Almost surely, 2^1242476887 is an apocalyptic number.

1242476887 is a deficient number, since it is larger than the sum of its proper divisors (2883209).

1242476887 is an equidigital number, since it uses as much as digits as its factorization.

1242476887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883208.

The product of its digits is 1204224, while the sum is 49.

The square root of 1242476887 is about 35248.7856102873. The cubic root of 1242476887 is about 1075.0519209103.

The spelling of 1242476887 in words is "one billion, two hundred forty-two million, four hundred seventy-six thousand, eight hundred eighty-seven".