1242153422 has 4 divisors (see below), whose sum is σ = 1863230136. Its totient is φ = 621076710.

The previous prime is 1242153391. The next prime is 1242153439. The reversal of 1242153422 is 2243512421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2243512421 = 39293 ⋅57097.

It is a junction number, because it is equal to n+sod(n) for n = 1242153391 and 1242153400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310538354 + ... + 310538357.

It is an arithmetic number, because the mean of its divisors is an integer number (465807534).

Almost surely, 2^1242153422 is an apocalyptic number.

1242153422 is a deficient number, since it is larger than the sum of its proper divisors (621076714).

1242153422 is an equidigital number, since it uses as much as digits as its factorization.

1242153422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621076713.

The product of its digits is 3840, while the sum is 26.

The square root of 1242153422 is about 35244.1969975200. The cubic root of 1242153422 is about 1074.9586202208.

Adding to 1242153422 its reverse (2243512421), we get a palindrome (3485665843).

The spelling of 1242153422 in words is "one billion, two hundred forty-two million, one hundred fifty-three thousand, four hundred twenty-two".