248021421 has 16 divisors (see below), whose sum is σ = 359331840. Its totient is φ = 151590960.

The previous prime is 248021413. The next prime is 248021429. The reversal of 248021421 is 124120842.

It is an interprime number because it is at equal distance from previous prime (248021413) and next prime (248021429).

It is not a de Polignac number, because 248021421 - 2³ = 248021413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 248021391 and 248021400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248021429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68415 + ... + 71948.

It is an arithmetic number, because the mean of its divisors is an integer number (22458240).

Almost surely, 2^248021421 is an apocalyptic number.

It is an amenable number.

248021421 is a deficient number, since it is larger than the sum of its proper divisors (111310419).

248021421 is a wasteful number, since it uses less digits than its factorization.

248021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140416.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 248021421 is about 15748.6958507681. The cubic root of 248021421 is about 628.2942190744.

The spelling of 248021421 in words is "two hundred forty-eight million, twenty-one thousand, four hundred twenty-one".