61042061 has 4 divisors (see below), whose sum is σ = 62193852. Its totient is φ = 59890272.

The previous prime is 61042057. The next prime is 61042067. The reversal of 61042061 is 16024016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30858025 + 30184036 = 5555^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 61042061 - 2² = 61042057 is a prime.

It is a super-2 number, since 2×61042061² = 7452266422255442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61042067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575816 + ... + 575921.

It is an arithmetic number, because the mean of its divisors is an integer number (15548463).

Almost surely, 2^61042061 is an apocalyptic number.

It is an amenable number.

61042061 is a deficient number, since it is larger than the sum of its proper divisors (1151791).

61042061 is a wasteful number, since it uses less digits than its factorization.

61042061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151790.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 61042061 is about 7812.9418915028. The cubic root of 61042061 is about 393.7401745764.

Adding to 61042061 its reverse (16024016), we get a palindrome (77066077).

The spelling of 61042061 in words is "sixty-one million, forty-two thousand, sixty-one".