148861 has 2 divisors, whose sum is σ = 148862. Its totient is φ = 148860.

The previous prime is 148859. The next prime is 148867. The reversal of 148861 is 168841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93636 + 55225 = 306^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 148861 - 2¹ = 148859 is a prime.

Together with 148859, it forms a pair of twin primes.

It is an Ulam number.

148861 is a lucky number.

It is a plaindrome in base 7 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74430 + 74431.

It is an arithmetic number, because the mean of its divisors is an integer number (74431).

2¹⁴⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

148861 is a deficient number, since it is larger than the sum of its proper divisors (1).

148861 is an equidigital number, since it uses as much as digits as its factorization.

148861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 148861 is about 385.8250899047. The cubic root of 148861 is about 52.9981012729.

The spelling of 148861 in words is "one hundred forty-eight thousand, eight hundred sixty-one".