248721001 has 16 divisors (see below), whose sum is σ = 268128640. Its totient is φ = 230014080.

The previous prime is 248720981. The next prime is 248721007. The reversal of 248721001 is 100127842.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 248721001 - 2²¹ = 246623849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248721007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141991 + ... + 143731.

It is an arithmetic number, because the mean of its divisors is an integer number (16758040).

Almost surely, 2^248721001 is an apocalyptic number.

It is an amenable number.

248721001 is a deficient number, since it is larger than the sum of its proper divisors (19407639).

248721001 is a wasteful number, since it uses less digits than its factorization.

248721001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 248721001 is about 15770.8909386883. The cubic root of 248721001 is about 628.8843958564.

Adding to 248721001 its reverse (100127842), we get a palindrome (348848843).

The spelling of 248721001 in words is "two hundred forty-eight million, seven hundred twenty-one thousand, one".