149451 has 8 divisors (see below), whose sum is σ = 205824. Its totient is φ = 96360.

The previous prime is 149441. The next prime is 149459. The reversal of 149451 is 154941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149451 - 2⁵ = 149419 is a prime.

149451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (149459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711 + ... + 896.

It is an arithmetic number, because the mean of its divisors is an integer number (25728).

2¹⁴⁹⁴⁵¹ is an apocalyptic number.

149451 is the 245-th centered pentagonal number.

149451 is a deficient number, since it is larger than the sum of its proper divisors (56373).

149451 is a wasteful number, since it uses less digits than its factorization.

149451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its digits is 720, while the sum is 24.

The square root of 149451 is about 386.5889289672. The cubic root of 149451 is about 53.0680270422.

The spelling of 149451 in words is "one hundred forty-nine thousand, four hundred fifty-one".