71761045 has 8 divisors (see below), whose sum is σ = 86179896. Its totient is φ = 57364416.

The previous prime is 71761033. The next prime is 71761061. The reversal of 71761045 is 54016717.

It can be written as a sum of positive squares in 4 ways, for example, as 43639236 + 28121809 = 6606^2 + 5303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71761045 - 2⁵ = 71761013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71760998 and 71761016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659 + ... + 12271.

It is an arithmetic number, because the mean of its divisors is an integer number (10772487).

Almost surely, 2^71761045 is an apocalyptic number.

It is an amenable number.

71761045 is a deficient number, since it is larger than the sum of its proper divisors (14418851).

71761045 is a wasteful number, since it uses less digits than its factorization.

71761045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 71761045 is about 8471.1891136959. The cubic root of 71761045 is about 415.5560263556.

The spelling of 71761045 in words is "seventy-one million, seven hundred sixty-one thousand, forty-five".