71242651 has 2 divisors, whose sum is σ = 71242652. Its totient is φ = 71242650.

The previous prime is 71242621. The next prime is 71242687. The reversal of 71242651 is 15624217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71242651 - 2¹³ = 71234459 is a prime.

It is not a weakly prime, because it can be changed into another prime (71242601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35621325 + 35621326.

It is an arithmetic number, because the mean of its divisors is an integer number (35621326).

Almost surely, 2^71242651 is an apocalyptic number.

71242651 is a deficient number, since it is larger than the sum of its proper divisors (1).

71242651 is an equidigital number, since it uses as much as digits as its factorization.

71242651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 71242651 is about 8440.5361796511. The cubic root of 71242651 is about 414.5529632481.

Adding to 71242651 its reverse (15624217), we get a palindrome (86866868).

The spelling of 71242651 in words is "seventy-one million, two hundred forty-two thousand, six hundred fifty-one".