171421804 has 6 divisors (see below), whose sum is σ = 299988164. Its totient is φ = 85710900.

The previous prime is 171421787. The next prime is 171421837. The reversal of 171421804 is 408124171.

171421804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×171421804² = 58770869773228832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21427722 + ... + 21427729.

Almost surely, 2^171421804 is an apocalyptic number.

It is an amenable number.

171421804 is a deficient number, since it is larger than the sum of its proper divisors (128566360).

171421804 is a wasteful number, since it uses less digits than its factorization.

171421804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42855455 (or 42855453 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 171421804 is about 13092.8149761615. The cubic root of 171421804 is about 555.5059142548.

Adding to 171421804 its reverse (408124171), we get a palindrome (579545975).

It can be divided in two parts, 171421 and 804, that added together give a square (172225 = 415²).

The spelling of 171421804 in words is "one hundred seventy-one million, four hundred twenty-one thousand, eight hundred four".