161422587 has 6 divisors (see below), whose sum is σ = 233165972. Its totient is φ = 107615052.

The previous prime is 161422567. The next prime is 161422589. The reversal of 161422587 is 785224161.

It is not a de Polignac number, because 161422587 - 2¹⁸ = 161160443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161422589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8967913 + ... + 8967930.

Almost surely, 2^161422587 is an apocalyptic number.

161422587 is a deficient number, since it is larger than the sum of its proper divisors (71743385).

161422587 is a wasteful number, since it uses less digits than its factorization.

161422587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17935849 (or 17935846 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 161422587 is about 12705.2188883151. The cubic root of 161422587 is about 544.4877345728.

The spelling of 161422587 in words is "one hundred sixty-one million, four hundred twenty-two thousand, five hundred eighty-seven".