61442081 has 2 divisors, whose sum is σ = 61442082. Its totient is φ = 61442080.

The previous prime is 61442053. The next prime is 61442099. The reversal of 61442081 is 18024416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 11669056 = 7055^2 + 3416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61442081 is a prime.

It is a super-2 number, since 2×61442081² = 7550258635221122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61442081.

It is not a weakly prime, because it can be changed into another prime (61442011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30721040 + 30721041.

It is an arithmetic number, because the mean of its divisors is an integer number (30721041).

Almost surely, 2^61442081 is an apocalyptic number.

It is an amenable number.

61442081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61442081 is an equidigital number, since it uses as much as digits as its factorization.

61442081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 61442081 is about 7838.4999202654. The cubic root of 61442081 is about 394.5983868663.

Adding to 61442081 its reverse (18024416), we get a palindrome (79466497).

The spelling of 61442081 in words is "sixty-one million, four hundred forty-two thousand, eighty-one".