71428497 has 8 divisors (see below), whose sum is σ = 108843456. Its totient is φ = 40816272.

The previous prime is 71428493. The next prime is 71428507. The reversal of 71428497 is 79482417.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71428497 - 2² = 71428493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71428493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700658 + ... + 1700699.

It is an arithmetic number, because the mean of its divisors is an integer number (13605432).

Almost surely, 2^71428497 is an apocalyptic number.

It is an amenable number.

71428497 is a deficient number, since it is larger than the sum of its proper divisors (37414959).

71428497 is a wasteful number, since it uses less digits than its factorization.

71428497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401367.

The product of its digits is 112896, while the sum is 42.

The square root of 71428497 is about 8451.5381440304. The cubic root of 71428497 is about 414.9131225699.

The spelling of 71428497 in words is "seventy-one million, four hundred twenty-eight thousand, four hundred ninety-seven".