1231420234 has 8 divisors (see below), whose sum is σ = 2015051328. Its totient is φ = 559736460.

The previous prime is 1231420213. The next prime is 1231420247. The reversal of 1231420234 is 4320241321.

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

It is a super-2 number, since 2×1231420234² = 3032791585409229512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 55973647 = 1231420234 / (1 + 2 + 3 + 1 + 4 + 2 + 0 + 2 + 3 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27986802 + ... + 27986845.

It is an arithmetic number, because the mean of its divisors is an integer number (251881416).

Almost surely, 2^1231420234 is an apocalyptic number.

1231420234 is a deficient number, since it is larger than the sum of its proper divisors (783631094).

1231420234 is a wasteful number, since it uses less digits than its factorization.

1231420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55973660.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1231420234 is about 35091.5977692666. The cubic root of 1231420234 is about 1071.8534951687.

Adding to 1231420234 its reverse (4320241321), we get a palindrome (5551661555).

The spelling of 1231420234 in words is "one billion, two hundred thirty-one million, four hundred twenty thousand, two hundred thirty-four".