61121271 has 12 divisors (see below), whose sum is σ = 86011512. Its totient is φ = 38602224.

The previous prime is 61121209. The next prime is 61121279. The reversal of 61121271 is 17212116.

It is a happy number.

It is not a de Polignac number, because 61121271 - 2¹⁴ = 61104887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61121279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27136 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (7167626).

Almost surely, 2^61121271 is an apocalyptic number.

61121271 is a deficient number, since it is larger than the sum of its proper divisors (24890241).

61121271 is a wasteful number, since it uses less digits than its factorization.

61121271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56478 (or 56459 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 61121271 is about 7818.0094013758. The cubic root of 61121271 is about 393.9104106300.

Adding to 61121271 its reverse (17212116), we get a palindrome (78333387).

The spelling of 61121271 in words is "sixty-one million, one hundred twenty-one thousand, two hundred seventy-one".