71457426 has 48 divisors (see below), whose sum is σ = 164697624. Its totient is φ = 22313472.

The previous prime is 71457403. The next prime is 71457427. The reversal of 71457426 is 62475417.

It can be written as a sum of positive squares in 4 ways, for example, as 71419401 + 38025 = 8451^2 + 195^2 .

It is not an unprimeable number, because it can be changed into a prime (71457427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89260 + ... + 90056.

Almost surely, 2^71457426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71457426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82348812).

71457426 is an abundant number, since it is smaller than the sum of its proper divisors (93240198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71457426 is a wasteful number, since it uses less digits than its factorization.

71457426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1112 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 71457426 is about 8453.2494343891. The cubic root of 71457426 is about 414.9691291693.

Subtracting from 71457426 its reverse (62475417), we obtain a square (8982009 = 2997²).

The spelling of 71457426 in words is "seventy-one million, four hundred fifty-seven thousand, four hundred twenty-six".