148042981 has 2 divisors, whose sum is σ = 148042982. Its totient is φ = 148042980.

The previous prime is 148042931. The next prime is 148042991. The reversal of 148042981 is 189240841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104878081 + 43164900 = 10241^2 + 6570^2 .

It is a cyclic number.

It is not a de Polignac number, because 148042981 - 2⁹ = 148042469 is a prime.

It is a super-2 number, since 2×148042981² = 43833448446732722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 148042981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148042901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74021490 + 74021491.

It is an arithmetic number, because the mean of its divisors is an integer number (74021491).

Almost surely, 2^148042981 is an apocalyptic number.

It is an amenable number.

148042981 is a deficient number, since it is larger than the sum of its proper divisors (1).

148042981 is an equidigital number, since it uses as much as digits as its factorization.

148042981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 148042981 is about 12167.2914405795. The cubic root of 148042981 is about 529.0084475193.

The spelling of 148042981 in words is "one hundred forty-eight million, forty-two thousand, nine hundred eighty-one".