148585861 has 4 divisors (see below), whose sum is σ = 150117772. Its totient is φ = 147053952.

The previous prime is 148585859. The next prime is 148585891. The reversal of 148585861 is 168585841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168585841 = 19 ⋅8872939.

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 64496961 = 9170^2 + 8031^2 .

It is a cyclic number.

It is not a de Polignac number, because 148585861 - 2¹ = 148585859 is a prime.

It is a super-2 number, since 2×148585861² = 44155516178222642, 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 (148585841) 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, 765810 + ... + 766003.

It is an arithmetic number, because the mean of its divisors is an integer number (37529443).

Almost surely, 2^148585861 is an apocalyptic number.

It is an amenable number.

148585861 is a deficient number, since it is larger than the sum of its proper divisors (1531911).

148585861 is an equidigital number, since it uses as much as digits as its factorization.

148585861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531910.

The product of its digits is 307200, while the sum is 46.

The square root of 148585861 is about 12189.5800173755. The cubic root of 148585861 is about 529.6542909848.

The spelling of 148585861 in words is "one hundred forty-eight million, five hundred eighty-five thousand, eight hundred sixty-one".