671539 has 8 divisors (see below), whose sum is σ = 750960. Its totient is φ = 595200.

The previous prime is 671537. The next prime is 671557. The reversal of 671539 is 935176.

671539 = T₂₃₆ + T₂₃₇ + ... + T₂₅₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671539 - 2¹ = 671537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671539.

It is not an unprimeable number, because it can be changed into a prime (671533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (93870).

2⁶⁷¹⁵³⁹ is an apocalyptic number.

671539 is a deficient number, since it is larger than the sum of its proper divisors (79421).

671539 is a wasteful number, since it uses less digits than its factorization.

671539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541.

The product of its digits is 5670, while the sum is 31.

The square root of 671539 is about 819.4748318283. The cubic root of 671539 is about 87.5703488674.

The spelling of 671539 in words is "six hundred seventy-one thousand, five hundred thirty-nine".