1231456542 has 8 divisors (see below), whose sum is σ = 2462913096. Its totient is φ = 410485512.

The previous prime is 1231456531. The next prime is 1231456559. The reversal of 1231456542 is 2456541321.

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

1231456542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102621373 + ... + 102621384.

It is an arithmetic number, because the mean of its divisors is an integer number (307864137).

Almost surely, 2^1231456542 is an apocalyptic number.

1231456542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231456542 is a wasteful number, since it uses less digits than its factorization.

1231456542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205242762.

The product of its digits is 28800, while the sum is 33.

The square root of 1231456542 is about 35092.1150972694. The cubic root of 1231456542 is about 1071.8640294752.

Adding to 1231456542 its reverse (2456541321), we get a palindrome (3687997863).

The spelling of 1231456542 in words is "one billion, two hundred thirty-one million, four hundred fifty-six thousand, five hundred forty-two".