1020400352142 has 16 divisors (see below), whose sum is σ = 2160847804752. Its totient is φ = 320125600640.

The previous prime is 1020400352137. The next prime is 1020400352171. The reversal of 1020400352142 is 2412530040201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001962409 + ... + 5001962612.

It is an arithmetic number, because the mean of its divisors is an integer number (135052987797).

Almost surely, 2^{1020400352142} is an apocalyptic number.

1020400352142 is an abundant number, since it is smaller than the sum of its proper divisors (1140447452610).

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

1020400352142 is a wasteful number, since it uses less digits than its factorization.

1020400352142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10003925043.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 1020400352142 its reverse (2412530040201), we get a palindrome (3432930392343).

The spelling of 1020400352142 in words is "one trillion, twenty billion, four hundred million, three hundred fifty-two thousand, one hundred forty-two".