61871000 has 32 divisors (see below), whose sum is σ = 144780480. Its totient is φ = 24748000.

The previous prime is 61870987. The next prime is 61871021. The reversal of 61871000 is 17816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29936 + ... + 31935.

It is an arithmetic number, because the mean of its divisors is an integer number (4524390).

Almost surely, 2^61871000 is an apocalyptic number.

It is an amenable number.

61871000 is an abundant number, since it is smaller than the sum of its proper divisors (82909480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61871000 is a wasteful number, since it uses less digits than its factorization.

61871000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61892 (or 61878 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 61871000 is about 7865.8121004763. The cubic root of 61871000 is about 395.5144714352.

Adding to 61871000 its reverse (17816), we get a palindrome (61888816).

The spelling of 61871000 in words is "sixty-one million, eight hundred seventy-one thousand".