671374145 has 16 divisors (see below), whose sum is σ = 868224000. Its totient is φ = 495440064.

The previous prime is 671374141. The next prime is 671374199. The reversal of 671374145 is 541473176.

It is a cyclic number.

It is not a de Polignac number, because 671374145 - 2² = 671374141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671374099 and 671374108.

It is not an unprimeable number, because it can be changed into a prime (671374141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127352 + ... + 132518.

It is an arithmetic number, because the mean of its divisors is an integer number (54264000).

Almost surely, 2^671374145 is an apocalyptic number.

671374145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

671374145 is a deficient number, since it is larger than the sum of its proper divisors (196849855).

671374145 is a wasteful number, since it uses less digits than its factorization.

671374145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184.

The product of its digits is 70560, while the sum is 38.

The square root of 671374145 is about 25910.8885413063. Note that the first 3 decimals coincide. The cubic root of 671374145 is about 875.6318244755.

The spelling of 671374145 in words is "six hundred seventy-one million, three hundred seventy-four thousand, one hundred forty-five".