71241890 has 16 divisors (see below), whose sum is σ = 129055032. Its totient is φ = 28314624.

The previous prime is 71241871. The next prime is 71241913. The reversal of 71241890 is 9814217.

It can be written as a sum of positive squares in 4 ways, for example, as 52258441 + 18983449 = 7229^2 + 4357^2 .

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 7 ways as a sum of consecutive naturals, for example, 21119 + ... + 24258.

Almost surely, 2^71241890 is an apocalyptic number.

71241890 is a deficient number, since it is larger than the sum of its proper divisors (57813142).

71241890 is a wasteful number, since it uses less digits than its factorization.

71241890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45541.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 71241890 is about 8440.4910994562. The cubic root of 71241890 is about 414.5514871851.

The spelling of 71241890 in words is "seventy-one million, two hundred forty-one thousand, eight hundred ninety".