61852121 has 4 divisors (see below), whose sum is σ = 61877172. Its totient is φ = 61827072.

The previous prime is 61852117. The next prime is 61852127. The reversal of 61852121 is 12125816.

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 3115225 + 58736896 = 1765^2 + 7664^2 .

It is a cyclic number.

It is not a de Polignac number, because 61852121 - 2² = 61852117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61852127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8360 + ... + 13913.

It is an arithmetic number, because the mean of its divisors is an integer number (15469293).

Almost surely, 2^61852121 is an apocalyptic number.

It is an amenable number.

61852121 is a deficient number, since it is larger than the sum of its proper divisors (25051).

61852121 is a wasteful number, since it uses less digits than its factorization.

61852121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25050.

The product of its digits is 960, while the sum is 26.

The square root of 61852121 is about 7864.6119421113. The cubic root of 61852121 is about 395.4742389229.

Adding to 61852121 its reverse (12125816), we get a palindrome (73977937).

The spelling of 61852121 in words is "sixty-one million, eight hundred fifty-two thousand, one hundred twenty-one".