71257055 has 4 divisors (see below), whose sum is σ = 85508472. Its totient is φ = 57005640.

The previous prime is 71257037. The next prime is 71257093. The reversal of 71257055 is 55075217.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-71257055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125701 + ... + 7125710.

It is an arithmetic number, because the mean of its divisors is an integer number (21377118).

Almost surely, 2^71257055 is an apocalyptic number.

71257055 is a deficient number, since it is larger than the sum of its proper divisors (14251417).

71257055 is a wasteful number, since it uses less digits than its factorization.

71257055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14251416.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 71257055 is about 8441.3893998559. The cubic root of 71257055 is about 414.5808997834.

The spelling of 71257055 in words is "seventy-one million, two hundred fifty-seven thousand, fifty-five".