148541981 has 32 divisors (see below), whose sum is σ = 190464000. Its totient is φ = 115259760.

The previous prime is 148541969. The next prime is 148541989. The reversal of 148541981 is 189145841.

It is a de Polignac number, because none of the positive numbers 2^k-148541981 is a prime.

It is a super-2 number, since 2×148541981² = 44129440238808722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148541989) 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 31 ways as a sum of consecutive naturals, for example, 149396 + ... + 150386.

It is an arithmetic number, because the mean of its divisors is an integer number (5952000).

Almost surely, 2^148541981 is an apocalyptic number.

It is an amenable number.

148541981 is a deficient number, since it is larger than the sum of its proper divisors (41922019).

148541981 is an equidigital number, since it uses as much as digits as its factorization.

148541981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1040 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 148541981 is about 12187.7799865275. The cubic root of 148541981 is about 529.6021471304.

The spelling of 148541981 in words is "one hundred forty-eight million, five hundred forty-one thousand, nine hundred eighty-one".