71042519 has 2 divisors, whose sum is σ = 71042520. Its totient is φ = 71042518.

The previous prime is 71042471. The next prime is 71042537. The reversal of 71042519 is 91524017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71042519 - 2⁸ = 71042263 is a prime.

It is a super-2 number, since 2×71042519² = 10094079011730722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71042491 and 71042500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71042119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35521259 + 35521260.

It is an arithmetic number, because the mean of its divisors is an integer number (35521260).

Almost surely, 2^71042519 is an apocalyptic number.

71042519 is a deficient number, since it is larger than the sum of its proper divisors (1).

71042519 is an equidigital number, since it uses as much as digits as its factorization.

71042519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 71042519 is about 8428.6724340195. The cubic root of 71042519 is about 414.1644173347.

The spelling of 71042519 in words is "seventy-one million, forty-two thousand, five hundred nineteen".