148644865 has 8 divisors (see below), whose sum is σ = 184524840. Its totient is φ = 114815232.

The previous prime is 148644857. The next prime is 148644869. The reversal of 148644865 is 568446841.

It is a Cunningham number, because it is equal to 12192²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 53523856 + 95121009 = 7316^2 + 9753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 148644865 - 2³ = 148644857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (148644869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512424 + ... + 512713.

It is an arithmetic number, because the mean of its divisors is an integer number (23065605).

Almost surely, 2^148644865 is an apocalyptic number.

It is an amenable number.

148644865 is a deficient number, since it is larger than the sum of its proper divisors (35879975).

148644865 is a wasteful number, since it uses less digits than its factorization.

148644865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025171.

The product of its digits is 737280, while the sum is 46.

The square root of 148644865 is about 12192.0000410105. Note that the first 4 decimals coincide. The cubic root of 148644865 is about 529.7243909386.

The spelling of 148644865 in words is "one hundred forty-eight million, six hundred forty-four thousand, eight hundred sixty-five".