71172894 has 32 divisors (see below), whose sum is σ = 155594880. Its totient is φ = 21570912.

The previous prime is 71172887. The next prime is 71172901. The reversal of 71172894 is 49827117.

It is an interprime number because it is at equal distance from previous prime (71172887) and next prime (71172901).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1584 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (4862340).

Almost surely, 2^71172894 is an apocalyptic number.

71172894 is an abundant number, since it is smaller than the sum of its proper divisors (84421986).

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

71172894 is a wasteful number, since it uses less digits than its factorization.

71172894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13704.

The product of its digits is 28224, while the sum is 39.

The square root of 71172894 is about 8436.4029064525. The cubic root of 71172894 is about 414.4176163546.

It can be divided in two parts, 7117 and 2894, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 71172894 in words is "seventy-one million, one hundred seventy-two thousand, eight hundred ninety-four".