561386142 has 48 divisors (see below), whose sum is σ = 1255205952. Its totient is φ = 181232640.

The previous prime is 561386131. The next prime is 561386171. The reversal of 561386142 is 241683165.

It is a happy number.

561386142 is a `hidden beast` number, since 5 + 6 + 1 + 38 + 614 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 561386097 and 561386106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78642 + ... + 85482.

It is an arithmetic number, because the mean of its divisors is an integer number (26150124).

Almost surely, 2^561386142 is an apocalyptic number.

561386142 is an abundant number, since it is smaller than the sum of its proper divisors (693819810).

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

561386142 is a wasteful number, since it uses less digits than its factorization.

561386142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6990 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 561386142 is about 23693.5886264618. The cubic root of 561386142 is about 824.9365813510.

The spelling of 561386142 in words is "five hundred sixty-one million, three hundred eighty-six thousand, one hundred forty-two".