71400451 has 2 divisors, whose sum is σ = 71400452. Its totient is φ = 71400450.

The previous prime is 71400449. The next prime is 71400463. The reversal of 71400451 is 15400417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71400451 - 2¹ = 71400449 is a prime.

Together with 71400449, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71400421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35700225 + 35700226.

It is an arithmetic number, because the mean of its divisors is an integer number (35700226).

Almost surely, 2^71400451 is an apocalyptic number.

71400451 is a deficient number, since it is larger than the sum of its proper divisors (1).

71400451 is an equidigital number, since it uses as much as digits as its factorization.

71400451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 71400451 is about 8449.8787565266. The cubic root of 71400451 is about 414.8588110216.

Adding to 71400451 its reverse (15400417), we get a palindrome (86800868).

The spelling of 71400451 in words is "seventy-one million, four hundred thousand, four hundred fifty-one".