71426057 has 4 divisors (see below), whose sum is σ = 72058260. Its totient is φ = 70793856.

The previous prime is 71426029. The next prime is 71426081. The reversal of 71426057 is 75062417.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39740416 + 31685641 = 6304^2 + 5629^2 .

It is a cyclic number.

It is not a de Polignac number, because 71426057 - 2²⁶ = 4317193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71426357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315932 + ... + 316157.

It is an arithmetic number, because the mean of its divisors is an integer number (18014565).

Almost surely, 2^71426057 is an apocalyptic number.

It is an amenable number.

71426057 is a deficient number, since it is larger than the sum of its proper divisors (632203).

71426057 is a wasteful number, since it uses less digits than its factorization.

71426057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632202.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 71426057 is about 8451.3937903756. The cubic root of 71426057 is about 414.9083980337.

The spelling of 71426057 in words is "seventy-one million, four hundred twenty-six thousand, fifty-seven".