71406427 has 4 divisors (see below), whose sum is σ = 75164680. Its totient is φ = 67648176.

The previous prime is 71406407. The next prime is 71406431. The reversal of 71406427 is 72460417.

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

It is a cyclic number.

It is not a de Polignac number, because 71406427 - 2¹⁹ = 70882139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71406407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1879098 + ... + 1879135.

It is an arithmetic number, because the mean of its divisors is an integer number (18791170).

Almost surely, 2^71406427 is an apocalyptic number.

71406427 is a deficient number, since it is larger than the sum of its proper divisors (3758253).

71406427 is a wasteful number, since it uses less digits than its factorization.

71406427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758252.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 71406427 is about 8450.2323636691. The cubic root of 71406427 is about 414.8703848378.

The spelling of 71406427 in words is "seventy-one million, four hundred six thousand, four hundred twenty-seven".