247501 has 2 divisors, whose sum is σ = 247502. Its totient is φ = 247500.

The previous prime is 247463. The next prime is 247519. The reversal of 247501 is 105742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 44100 = 451^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 247501 - 2¹⁵ = 214733 is a prime.

It is a super-2 number, since 2×247501² = 122513490002, which contains 22 as substring.

247501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123750 + 123751.

It is an arithmetic number, because the mean of its divisors is an integer number (123751).

2²⁴⁷⁵⁰¹ is an apocalyptic number.

It is an amenable number.

247501 is a deficient number, since it is larger than the sum of its proper divisors (1).

247501 is an equidigital number, since it uses as much as digits as its factorization.

247501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 247501 is about 497.4947235901. The cubic root of 247501 is about 62.7854463415.

The spelling of 247501 in words is "two hundred forty-seven thousand, five hundred one".