71451251 has 8 divisors (see below), whose sum is σ = 73529280. Its totient is φ = 69392232.

The previous prime is 71451241. The next prime is 71451253. The reversal of 71451251 is 15215417.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71451251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71451251.

It is not an unprimeable number, because it can be changed into a prime (71451253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3056 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (9191160).

Almost surely, 2^71451251 is an apocalyptic number.

71451251 is a deficient number, since it is larger than the sum of its proper divisors (2078029).

71451251 is a wasteful number, since it uses less digits than its factorization.

71451251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505.

The product of its digits is 1400, while the sum is 26.

The square root of 71451251 is about 8452.8841823368. The cubic root of 71451251 is about 414.9571756265.

Adding to 71451251 its reverse (15215417), we get a palindrome (86666668).

The spelling of 71451251 in words is "seventy-one million, four hundred fifty-one thousand, two hundred fifty-one".