71428481 has 2 divisors, whose sum is σ = 71428482. Its totient is φ = 71428480.

The previous prime is 71428453. The next prime is 71428493. The reversal of 71428481 is 18482417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 14938225 = 7516^2 + 3865^2 .

It is a cyclic number.

It is not a de Polignac number, because 71428481 - 2⁶ = 71428417 is a prime.

It is a super-2 number, since 2×71428481² = 10204055795934722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71428411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714240 + 35714241.

It is an arithmetic number, because the mean of its divisors is an integer number (35714241).

Almost surely, 2^71428481 is an apocalyptic number.

It is an amenable number.

71428481 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428481 is an equidigital number, since it uses as much as digits as its factorization.

71428481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 35.

The square root of 71428481 is about 8451.5371974570. The cubic root of 71428481 is about 414.9130915896.

The spelling of 71428481 in words is "seventy-one million, four hundred twenty-eight thousand, four hundred eighty-one".