148661 has 4 divisors (see below), whose sum is σ = 151872. Its totient is φ = 145452.

The previous prime is 148639. The next prime is 148663. The reversal of 148661 is 166841.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148663) 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, 1535 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (37968).

2¹⁴⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

148661 is a deficient number, since it is larger than the sum of its proper divisors (3211).

148661 is an equidigital number, since it uses as much as digits as its factorization.

148661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210.

The product of its digits is 1152, while the sum is 26.

The square root of 148661 is about 385.5658179870. The cubic root of 148661 is about 52.9743556964.

The spelling of 148661 in words is "one hundred forty-eight thousand, six hundred sixty-one".