71405450 has 12 divisors (see below), whose sum is σ = 132814230. Its totient is φ = 28562160.

The previous prime is 71405443. The next prime is 71405473. The reversal of 71405450 is 5450417.

It can be written as a sum of positive squares in 3 ways, for example, as 49042009 + 22363441 = 7003^2 + 4729^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714005 + ... + 714104.

Almost surely, 2^71405450 is an apocalyptic number.

71405450 is a deficient number, since it is larger than the sum of its proper divisors (61408780).

71405450 is a wasteful number, since it uses less digits than its factorization.

71405450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428121 (or 1428116 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 71405450 is about 8450.1745544101. The cubic root of 71405450 is about 414.8684927102.

Adding to 71405450 its reverse (5450417), we get a palindrome (76855867).

The spelling of 71405450 in words is "seventy-one million, four hundred five thousand, four hundred fifty".