61287471 has 24 divisors (see below), whose sum is σ = 102080160. Its totient is φ = 34707456.

The previous prime is 61287467. The next prime is 61287481. The reversal of 61287471 is 17478216.

It is not a de Polignac number, because 61287471 - 2² = 61287467 is a prime.

It is a super-3 number, since 3×61287471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61287481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2815 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (4253340).

Almost surely, 2^61287471 is an apocalyptic number.

61287471 is a deficient number, since it is larger than the sum of its proper divisors (40792689).

61287471 is a wasteful number, since it uses less digits than its factorization.

61287471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8735 (or 8732 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 61287471 is about 7828.6314896028. The cubic root of 61287471 is about 394.2671258340.

The spelling of 61287471 in words is "sixty-one million, two hundred eighty-seven thousand, four hundred seventy-one".