561421392 has 160 divisors (see below), whose sum is σ = 1719508992. Its totient is φ = 154524672.

The previous prime is 561421391. The next prime is 561421409. The reversal of 561421392 is 293124165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561421391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1152573 + ... + 1153059.

Almost surely, 2^561421392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561421392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859754496).

561421392 is an abundant number, since it is smaller than the sum of its proper divisors (1158087600).

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

561421392 is a wasteful number, since it uses less digits than its factorization.

561421392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 619 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 561421392 is about 23694.3324869050. The cubic root of 561421392 is about 824.9538471886.

The spelling of 561421392 in words is "five hundred sixty-one million, four hundred twenty-one thousand, three hundred ninety-two".