671251140 has 72 divisors (see below), whose sum is σ = 2327008320. Its totient is φ = 153428544.

The previous prime is 671251123. The next prime is 671251169. The reversal of 671251140 is 41152176.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 265110 + ... + 267629.

It is an arithmetic number, because the mean of its divisors is an integer number (32319560).

Almost surely, 2^671251140 is an apocalyptic number.

671251140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671251140 is an abundant number, since it is smaller than the sum of its proper divisors (1655757180).

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

671251140 is a wasteful number, since it uses less digits than its factorization.

671251140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532761 (or 532756 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 671251140 is about 25908.5148165618. The cubic root of 671251140 is about 875.5783452683.

It can be divided in two parts, 67125 and 1140, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 671251140 in words is "six hundred seventy-one million, two hundred fifty-one thousand, one hundred forty".