248421761 has 4 divisors (see below), whose sum is σ = 283910592. Its totient is φ = 212932932.

The previous prime is 248421757. The next prime is 248421787. The reversal of 248421761 is 167124842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 248421761 - 2² = 248421757 is a prime.

It is a super-2 number, since 2×248421761² = 123426742676682242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (248421361) 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, 17744405 + ... + 17744418.

It is an arithmetic number, because the mean of its divisors is an integer number (70977648).

Almost surely, 2^248421761 is an apocalyptic number.

It is an amenable number.

248421761 is a deficient number, since it is larger than the sum of its proper divisors (35488831).

248421761 is an equidigital number, since it uses as much as digits as its factorization.

248421761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35488830.

The product of its digits is 21504, while the sum is 35.

The square root of 248421761 is about 15761.4009846841. The cubic root of 248421761 is about 628.6320878665.

The spelling of 248421761 in words is "two hundred forty-eight million, four hundred twenty-one thousand, seven hundred sixty-one".