148661641 has 4 divisors (see below), whose sum is σ = 148785412. Its totient is φ = 148537872.

The previous prime is 148661633. The next prime is 148661663. The reversal of 148661641 is 146166841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146166841 = 3433 ⋅42577.

It can be written as a sum of positive squares in 2 ways, for example, as 41332041 + 107329600 = 6429^2 + 10360^2 .

It is a cyclic number.

It is not a de Polignac number, because 148661641 - 2³ = 148661633 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 148661641.

It is not an unprimeable number, because it can be changed into a prime (148661341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60066 + ... + 62491.

It is an arithmetic number, because the mean of its divisors is an integer number (37196353).

Almost surely, 2^148661641 is an apocalyptic number.

It is an amenable number.

148661641 is a deficient number, since it is larger than the sum of its proper divisors (123771).

148661641 is a wasteful number, since it uses less digits than its factorization.

148661641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123770.

The product of its digits is 27648, while the sum is 37.

The square root of 148661641 is about 12192.6880137236. The cubic root of 148661641 is about 529.7443183499.

The spelling of 148661641 in words is "one hundred forty-eight million, six hundred sixty-one thousand, six hundred forty-one".