61272881 has 2 divisors, whose sum is σ = 61272882. Its totient is φ = 61272880.

The previous prime is 61272877. The next prime is 61272889. The reversal of 61272881 is 18827216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 21077281 = 6340^2 + 4591^2 .

It is a cyclic number.

It is not a de Polignac number, because 61272881 - 2² = 61272877 is a prime.

It is a super-2 number, since 2×61272881² = 7508731892080322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61272889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30636440 + 30636441.

It is an arithmetic number, because the mean of its divisors is an integer number (30636441).

Almost surely, 2^61272881 is an apocalyptic number.

It is an amenable number.

61272881 is a deficient number, since it is larger than the sum of its proper divisors (1).

61272881 is an equidigital number, since it uses as much as digits as its factorization.

61272881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 61272881 is about 7827.6995982217. The cubic root of 61272881 is about 394.2358371448.

The spelling of 61272881 in words is "sixty-one million, two hundred seventy-two thousand, eight hundred eighty-one".