149261 has 4 divisors (see below), whose sum is σ = 170592. Its totient is φ = 127932.

The previous prime is 149257. The next prime is 149269. The reversal of 149261 is 162941.

149261 = T₂₀₃ + T₂₀₄ + ... + T₂₀₉.

It is a happy number.

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: 162941 = 127 ⋅1283.

It is not a de Polignac number, because 149261 - 2² = 149257 is a prime.

It is a super-2 number, since 2×149261² = 44557692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10655 + ... + 10668.

It is an arithmetic number, because the mean of its divisors is an integer number (42648).

2¹⁴⁹²⁶¹ is an apocalyptic number.

It is an amenable number.

149261 is a deficient number, since it is larger than the sum of its proper divisors (21331).

149261 is an equidigital number, since it uses as much as digits as its factorization.

149261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21330.

The product of its digits is 432, while the sum is 23.

The square root of 149261 is about 386.3431117543. The cubic root of 149261 is about 53.0455286959.

The spelling of 149261 in words is "one hundred forty-nine thousand, two hundred sixty-one".