71829145 has 4 divisors (see below), whose sum is σ = 86194980. Its totient is φ = 57463312.

The previous prime is 71829119. The next prime is 71829169. The reversal of 71829145 is 54192817.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46063369 + 25765776 = 6787^2 + 5076^2 .

It is a cyclic number.

It is not a de Polignac number, because 71829145 - 2⁹ = 71828633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7182910 + ... + 7182919.

It is an arithmetic number, because the mean of its divisors is an integer number (21548745).

Almost surely, 2^71829145 is an apocalyptic number.

It is an amenable number.

71829145 is a deficient number, since it is larger than the sum of its proper divisors (14365835).

71829145 is a wasteful number, since it uses less digits than its factorization.

71829145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14365834.

The product of its digits is 20160, while the sum is 37.

The square root of 71829145 is about 8475.2076670722. The cubic root of 71829145 is about 415.6874366411.

The spelling of 71829145 in words is "seventy-one million, eight hundred twenty-nine thousand, one hundred forty-five".