149951 has 4 divisors (see below), whose sum is σ = 151392. Its totient is φ = 148512.

The previous prime is 149939. The next prime is 149953. The reversal of 149951 is 159941.

149951 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149951 - 2¹⁰ = 148927 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (37848).

2¹⁴⁹⁹⁵¹ is an apocalyptic number.

149951 is a deficient number, since it is larger than the sum of its proper divisors (1441).

149951 is a wasteful number, since it uses less digits than its factorization.

149951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its digits is 1620, while the sum is 29.

The square root of 149951 is about 387.2350707258. The cubic root of 149951 is about 53.1271422435.

The spelling of 149951 in words is "one hundred forty-nine thousand, nine hundred fifty-one".