71242577 has 4 divisors (see below), whose sum is σ = 81420096. Its totient is φ = 61065060.

The previous prime is 71242519. The next prime is 71242601. The reversal of 71242577 is 77524217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77524217 = 3011 ⋅25747.

It is not a de Polignac number, because 71242577 - 2⁸ = 71242321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71242517) 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 in 3 ways as a sum of consecutive naturals, for example, 5088749 + ... + 5088762.

It is an arithmetic number, because the mean of its divisors is an integer number (20355024).

Almost surely, 2^71242577 is an apocalyptic number.

It is an amenable number.

71242577 is a deficient number, since it is larger than the sum of its proper divisors (10177519).

71242577 is a wasteful number, since it uses less digits than its factorization.

71242577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177518.

The product of its digits is 27440, while the sum is 35.

The square root of 71242577 is about 8440.5317960422. The cubic root of 71242577 is about 414.5528197155.

The spelling of 71242577 in words is "seventy-one million, two hundred forty-two thousand, five hundred seventy-seven".