71049405 has 16 divisors (see below), whose sum is σ = 129919104. Its totient is φ = 32479680.

The previous prime is 71049403. The next prime is 71049421. The reversal of 71049405 is 50494017.

It is a happy number.

It is not a de Polignac number, because 71049405 - 2¹ = 71049403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71049403) 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, 338226 + ... + 338435.

It is an arithmetic number, because the mean of its divisors is an integer number (8119944).

Almost surely, 2^71049405 is an apocalyptic number.

It is an amenable number.

71049405 is a deficient number, since it is larger than the sum of its proper divisors (58869699).

71049405 is a wasteful number, since it uses less digits than its factorization.

71049405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676676.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 71049405 is about 8429.0809107518. The cubic root of 71049405 is about 414.1777982606.

The spelling of 71049405 in words is "seventy-one million, forty-nine thousand, four hundred five".