61290061 has 4 divisors (see below), whose sum is σ = 70045792. Its totient is φ = 52534332.

The previous prime is 61290041. The next prime is 61290109. The reversal of 61290061 is 16009216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61290061 - 2¹⁷ = 61158989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61290011) 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, 4377855 + ... + 4377868.

It is an arithmetic number, because the mean of its divisors is an integer number (17511448).

Almost surely, 2^61290061 is an apocalyptic number.

It is an amenable number.

61290061 is a deficient number, since it is larger than the sum of its proper divisors (8755731).

61290061 is an equidigital number, since it uses as much as digits as its factorization.

61290061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755730.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 61290061 is about 7828.7969062941. The cubic root of 61290061 is about 394.2726796471.

Adding to 61290061 its reverse (16009216), we get a palindrome (77299277).

The spelling of 61290061 in words is "sixty-one million, two hundred ninety thousand, sixty-one".