71071407 has 48 divisors (see below), whose sum is σ = 119901600. Its totient is φ = 40423680.

The previous prime is 71071397. The next prime is 71071439. The reversal of 71071407 is 70417017.

It is not a de Polignac number, because 71071407 - 2⁴ = 71071391 is a prime.

It is a super-2 number, since 2×71071407² = 10102289785919298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71071447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203469 + ... + 203817.

It is an arithmetic number, because the mean of its divisors is an integer number (2497950).

Almost surely, 2^71071407 is an apocalyptic number.

71071407 is a deficient number, since it is larger than the sum of its proper divisors (48830193).

71071407 is a wasteful number, since it uses less digits than its factorization.

71071407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 71071407 is about 8430.3859342263. The cubic root of 71071407 is about 414.2205469152.

The spelling of 71071407 in words is "seventy-one million, seventy-one thousand, four hundred seven".