1242232078 has 4 divisors (see below), whose sum is σ = 1863348120. Its totient is φ = 621116038.

The previous prime is 1242232067. The next prime is 1242232091. The reversal of 1242232078 is 8702322421.

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

It is a super-2 number, since 2×1242232078² = 3086281071224396168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310558018 + ... + 310558021.

It is an arithmetic number, because the mean of its divisors is an integer number (465837030).

Almost surely, 2^1242232078 is an apocalyptic number.

1242232078 is a deficient number, since it is larger than the sum of its proper divisors (621116042).

1242232078 is an equidigital number, since it uses as much as digits as its factorization.

1242232078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621116041.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 1242232078 is about 35245.3128514984. The cubic root of 1242232078 is about 1074.9813093559.

Adding to 1242232078 its reverse (8702322421), we get a palindrome (9944554499).

It can be divided in two parts, 124 and 2232078, that multiplied together give a palindrome (276777672).

The spelling of 1242232078 in words is "one billion, two hundred forty-two million, two hundred thirty-two thousand, seventy-eight".