149761 has 4 divisors (see below), whose sum is σ = 154624. Its totient is φ = 144900.

The previous prime is 149759. The next prime is 149767. The reversal of 149761 is 167941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167941 = 19 ⋅8839.

It is a cyclic number.

It is not a de Polignac number, because 149761 - 2¹ = 149759 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (149767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2385 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (38656).

2¹⁴⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

149761 is a deficient number, since it is larger than the sum of its proper divisors (4863).

149761 is an equidigital number, since it uses as much as digits as its factorization.

149761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its digits is 1512, while the sum is 28.

The square root of 149761 is about 386.9896639447. The cubic root of 149761 is about 53.1046939695.

The spelling of 149761 in words is "one hundred forty-nine thousand, seven hundred sixty-one".