321261512742 has 64 divisors (see below), whose sum is σ = 738637056000. Its totient is φ = 103379832864.

The previous prime is 321261512687. The next prime is 321261512777. The reversal of 321261512742 is 247215162123.

321261512742 is a `hidden beast` number, since 3 + 2 + 12 + 61 + 512 + 74 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 321261512697 and 321261512706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18687883 + ... + 18705065.

It is an arithmetic number, because the mean of its divisors is an integer number (11541204000).

Almost surely, 2^321261512742 is an apocalyptic number.

321261512742 is an abundant number, since it is smaller than the sum of its proper divisors (417375543258).

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

321261512742 is a wasteful number, since it uses less digits than its factorization.

321261512742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29162 (or 29156 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

Adding to 321261512742 its reverse (247215162123), we get a palindrome (568476674865).

The spelling of 321261512742 in words is "three hundred twenty-one billion, two hundred sixty-one million, five hundred twelve thousand, seven hundred forty-two".