149559861 has 16 divisors (see below), whose sum is σ = 221110848. Its totient is φ = 89155200.

The previous prime is 149559859. The next prime is 149559889. The reversal of 149559861 is 168955941.

It is not a de Polignac number, because 149559861 - 2¹ = 149559859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149559861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149559821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35136 + ... + 39161.

It is an arithmetic number, because the mean of its divisors is an integer number (13819428).

Almost surely, 2^149559861 is an apocalyptic number.

149559861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149559861 is a deficient number, since it is larger than the sum of its proper divisors (71550987).

149559861 is a wasteful number, since it uses less digits than its factorization.

149559861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74372.

The product of its digits is 388800, while the sum is 48.

The square root of 149559861 is about 12229.4669139746. The cubic root of 149559861 is about 530.8090893742.

The spelling of 149559861 in words is "one hundred forty-nine million, five hundred fifty-nine thousand, eight hundred sixty-one".