1231454543442 has 32 divisors (see below), whose sum is σ = 2493039185280. Its totient is φ = 405481939200.

The previous prime is 1231454543413. The next prime is 1231454543471. The reversal of 1231454543442 is 2443454541321.

It is an interprime number because it is at equal distance from previous prime (1231454543413) and next prime (1231454543471).

It is a junction number, because it is equal to n+sod(n) for n = 1231454543394 and 1231454543403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084142 + ... + 2608937.

It is an arithmetic number, because the mean of its divisors is an integer number (77907474540).

Almost surely, 2^{1231454543442} is an apocalyptic number.

1231454543442 is an abundant number, since it is smaller than the sum of its proper divisors (1261584641838).

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

1231454543442 is a wasteful number, since it uses less digits than its factorization.

1231454543442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693618.

The product of its digits is 921600, while the sum is 42.

The spelling of 1231454543442 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-four million, five hundred forty-three thousand, four hundred forty-two".