148869521 has 2 divisors, whose sum is σ = 148869522. Its totient is φ = 148869520.

The previous prime is 148869517. The next prime is 148869571. The reversal of 148869521 is 125968841.

148869521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82609921 + 66259600 = 9089^2 + 8140^2 .

It is a cyclic number.

It is not a de Polignac number, because 148869521 - 2² = 148869517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148869571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74434760 + 74434761.

It is an arithmetic number, because the mean of its divisors is an integer number (74434761).

Almost surely, 2^148869521 is an apocalyptic number.

It is an amenable number.

148869521 is a deficient number, since it is larger than the sum of its proper divisors (1).

148869521 is an equidigital number, since it uses as much as digits as its factorization.

148869521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 44.

The square root of 148869521 is about 12201.2098170632. The cubic root of 148869521 is about 529.9911248069.

The spelling of 148869521 in words is "one hundred forty-eight million, eight hundred sixty-nine thousand, five hundred twenty-one".