71452457 has 4 divisors (see below), whose sum is σ = 71632836. Its totient is φ = 71272080.

The previous prime is 71452441. The next prime is 71452471. The reversal of 71452457 is 75425417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75425417 = 2551 ⋅29567.

It can be written as a sum of positive squares in 2 ways, for example, as 50922496 + 20529961 = 7136^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 71452457 - 2⁴ = 71452441 is a prime.

It is a super-2 number, since 2×71452457² = 10210907222673698, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (71452417) 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, 89594 + ... + 90387.

It is an arithmetic number, because the mean of its divisors is an integer number (17908209).

Almost surely, 2^71452457 is an apocalyptic number.

It is an amenable number.

71452457 is a deficient number, since it is larger than the sum of its proper divisors (180379).

71452457 is a wasteful number, since it uses less digits than its factorization.

71452457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180378.

The product of its digits is 39200, while the sum is 35.

The square root of 71452457 is about 8452.9555186337. The cubic root of 71452457 is about 414.9595102511.

The spelling of 71452457 in words is "seventy-one million, four hundred fifty-two thousand, four hundred fifty-seven".