561742001 has 2 divisors, whose sum is σ = 561742002. Its totient is φ = 561742000.

The previous prime is 561741967. The next prime is 561742031. The reversal of 561742001 is 100247165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514200976 + 47541025 = 22676^2 + 6895^2 .

It is a cyclic number.

It is not a de Polignac number, because 561742001 - 2¹⁴ = 561725617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561742031) 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 as a sum of consecutive naturals, namely, 280871000 + 280871001.

It is an arithmetic number, because the mean of its divisors is an integer number (280871001).

Almost surely, 2^561742001 is an apocalyptic number.

It is an amenable number.

561742001 is a deficient number, since it is larger than the sum of its proper divisors (1).

561742001 is an equidigital number, since it uses as much as digits as its factorization.

561742001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 561742001 is about 23701.0970421202. The cubic root of 561742001 is about 825.1108518325.

Adding to 561742001 its reverse (100247165), we get a palindrome (661989166).

The spelling of 561742001 in words is "five hundred sixty-one million, seven hundred forty-two thousand, one".