161286258 has 64 divisors (see below), whose sum is σ = 388657152. Its totient is φ = 43623360.

The previous prime is 161286253. The next prime is 161286263. The reversal of 161286258 is 852682161.

It is an interprime number because it is at equal distance from previous prime (161286253) and next prime (161286263).

It is not an unprimeable number, because it can be changed into a prime (161286253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98688 + ... + 100308.

It is an arithmetic number, because the mean of its divisors is an integer number (6072768).

Almost surely, 2^161286258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161286258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194328576).

161286258 is an abundant number, since it is smaller than the sum of its proper divisors (227370894).

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

161286258 is a wasteful number, since it uses less digits than its factorization.

161286258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759.

The product of its digits is 46080, while the sum is 39.

The square root of 161286258 is about 12699.8526763109. The cubic root of 161286258 is about 544.3344095305.

The spelling of 161286258 in words is "one hundred sixty-one million, two hundred eighty-six thousand, two hundred fifty-eight".