671642254 has 4 divisors (see below), whose sum is σ = 1007463384. Its totient is φ = 335821126.

The previous prime is 671642243. The next prime is 671642263. The reversal of 671642254 is 452246176.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×671642254² = 902206634716401032, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 167910562 + ... + 167910565.

It is an arithmetic number, because the mean of its divisors is an integer number (251865846).

Almost surely, 2^671642254 is an apocalyptic number.

671642254 is a deficient number, since it is larger than the sum of its proper divisors (335821130).

671642254 is a wasteful number, since it uses less digits than its factorization.

671642254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335821129.

The product of its digits is 80640, while the sum is 37.

The square root of 671642254 is about 25916.0616992629. The cubic root of 671642254 is about 875.7483682988.

The spelling of 671642254 in words is "six hundred seventy-one million, six hundred forty-two thousand, two hundred fifty-four".