671304942 has 128 divisors (see below), whose sum is σ = 1969505280. Its totient is φ = 164090880.

The previous prime is 671304937. The next prime is 671304947. The reversal of 671304942 is 249403176.

It is an interprime number because it is at equal distance from previous prime (671304937) and next prime (671304947).

It is a junction number, because it is equal to n+sod(n) for n = 671304897 and 671304906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671304947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65938 + ... + 75434.

It is an arithmetic number, because the mean of its divisors is an integer number (15386760).

Almost surely, 2^671304942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671304942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984752640).

671304942 is an abundant number, since it is smaller than the sum of its proper divisors (1298200338).

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

671304942 is a wasteful number, since it uses less digits than its factorization.

671304942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543 (or 9537 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 671304942 is about 25909.5531030545. The cubic root of 671304942 is about 875.6017377090.

The spelling of 671304942 in words is "six hundred seventy-one million, three hundred four thousand, nine hundred forty-two".