561742000 has 40 divisors (see below), whose sum is σ = 1358296992. Its totient is φ = 224696000.

The previous prime is 561741967. The next prime is 561742001. The reversal of 561742000 is 247165.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (561742001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138436 + ... + 142435.

Almost surely, 2^561742000 is an apocalyptic number.

561742000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561742000 is an abundant number, since it is smaller than the sum of its proper divisors (796554992).

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

561742000 is a wasteful number, since it uses less digits than its factorization.

561742000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280894 (or 280878 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 561742000 is about 23701.0970210242. The cubic root of 561742000 is about 825.1108513429.

Adding to 561742000 its reverse (247165), we get a palindrome (561989165).

The spelling of 561742000 in words is "five hundred sixty-one million, seven hundred forty-two thousand".