1231420142 has 8 divisors (see below), whose sum is σ = 1848735696. Its totient is φ = 615174912.

The previous prime is 1231420123. The next prime is 1231420147. The reversal of 1231420142 is 2410241321.

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

It is a super-2 number, since 2×1231420142² = 3032791132246600328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231420147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264698 + ... + 269309.

It is an arithmetic number, because the mean of its divisors is an integer number (231091962).

Almost surely, 2^1231420142 is an apocalyptic number.

1231420142 is a deficient number, since it is larger than the sum of its proper divisors (617315554).

1231420142 is a wasteful number, since it uses less digits than its factorization.

1231420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535162.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1231420142 is about 35091.5964584115. The cubic root of 1231420142 is about 1071.8534684758.

Adding to 1231420142 its reverse (2410241321), we get a palindrome (3641661463).

The spelling of 1231420142 in words is "one billion, two hundred thirty-one million, four hundred twenty thousand, one hundred forty-two".