71422187 has 8 divisors (see below), whose sum is σ = 73178112. Its totient is φ = 69676200.

The previous prime is 71422181. The next prime is 71422213. The reversal of 71422187 is 78122417.

It is a happy number.

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 71422187 - 2¹² = 71418091 is a prime.

It is a super-2 number, since 2×71422187² = 10202257591725938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71422181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13262 + ... + 17852.

It is an arithmetic number, because the mean of its divisors is an integer number (9147264).

Almost surely, 2^71422187 is an apocalyptic number.

71422187 is a deficient number, since it is larger than the sum of its proper divisors (1755925).

71422187 is a wasteful number, since it uses less digits than its factorization.

71422187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969.

The product of its digits is 6272, while the sum is 32.

The square root of 71422187 is about 8451.1648309567. The cubic root of 71422187 is about 414.9009043889.

The spelling of 71422187 in words is "seventy-one million, four hundred twenty-two thousand, one hundred eighty-seven".