71945141 has 4 divisors (see below), whose sum is σ = 74265984. Its totient is φ = 69624300.

The previous prime is 71945129. The next prime is 71945177. The reversal of 71945141 is 14154917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71945141 - 2¹⁴ = 71928757 is a prime.

It is a super-2 number, since 2×71945141² = 10352206627019762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71945098 and 71945107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71945101) 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, 1160375 + ... + 1160436.

It is an arithmetic number, because the mean of its divisors is an integer number (18566496).

Almost surely, 2^71945141 is an apocalyptic number.

It is an amenable number.

71945141 is a deficient number, since it is larger than the sum of its proper divisors (2320843).

71945141 is a wasteful number, since it uses less digits than its factorization.

71945141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320842.

The product of its digits is 5040, while the sum is 32.

The square root of 71945141 is about 8482.0481606744. The cubic root of 71945141 is about 415.9110791360.

The spelling of 71945141 in words is "seventy-one million, nine hundred forty-five thousand, one hundred forty-one".