149898 has 32 divisors (see below), whose sum is σ = 354816. Its totient is φ = 41328.

The previous prime is 149893. The next prime is 149899. The reversal of 149898 is 898941.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (149893) by changing a digit.

149898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (11088).

2¹⁴⁹⁸⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177408).

149898 is an abundant number, since it is smaller than the sum of its proper divisors (204918).

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

149898 is a wasteful number, since it uses less digits than its factorization.

149898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138.

The product of its digits is 20736, while the sum is 39.

The square root of 149898 is about 387.1666307935. The cubic root of 149898 is about 53.1208822645.

It can be divided in two parts, 1498 and 98, that added together give a triangular number (1596 = T₅₆).

The spelling of 149898 in words is "one hundred forty-nine thousand, eight hundred ninety-eight".