248145907 has 4 divisors (see below), whose sum is σ = 251545240. Its totient is φ = 244746576.

The previous prime is 248145893. The next prime is 248145913. The reversal of 248145907 is 709541842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709541842 = 2 ⋅354770921.

It is a cyclic number.

It is not a de Polignac number, because 248145907 - 2¹¹ = 248143859 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 248145907.

It is not an unprimeable number, because it can be changed into a prime (248145977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699557 + ... + 1699702.

It is an arithmetic number, because the mean of its divisors is an integer number (62886310).

Almost surely, 2^248145907 is an apocalyptic number.

248145907 is a deficient number, since it is larger than the sum of its proper divisors (3399333).

248145907 is an equidigital number, since it uses as much as digits as its factorization.

248145907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399332.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 248145907 is about 15752.6476187338. The cubic root of 248145907 is about 628.3993185344.

The spelling of 248145907 in words is "two hundred forty-eight million, one hundred forty-five thousand, nine hundred seven".