1243400142 has 32 divisors (see below), whose sum is σ = 2569042944. Its totient is φ = 400780800.

The previous prime is 1243400131. The next prime is 1243400159. The reversal of 1243400142 is 2410043421.

It is a congruent number.

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, 394798 + ... + 397934.

It is an arithmetic number, because the mean of its divisors is an integer number (80282592).

Almost surely, 2^1243400142 is an apocalyptic number.

1243400142 is an abundant number, since it is smaller than the sum of its proper divisors (1325642802).

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

1243400142 is a wasteful number, since it uses less digits than its factorization.

1243400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1243400142 is about 35261.8794450891. The cubic root of 1243400142 is about 1075.3181368126.

Adding to 1243400142 its reverse (2410043421), we get a palindrome (3653443563).

The spelling of 1243400142 in words is "one billion, two hundred forty-three million, four hundred thousand, one hundred forty-two".