247451 has 2 divisors, whose sum is σ = 247452. Its totient is φ = 247450.

The previous prime is 247439. The next prime is 247463. The reversal of 247451 is 154742.

It is a balanced prime because it is at equal distance from previous prime (247439) and next prime (247463).

It is a cyclic number.

It is not a de Polignac number, because 247451 - 2¹⁴ = 231067 is a prime.

It is a super-2 number, since 2×247451² = 122463994802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247421) 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, 123725 + 123726.

It is an arithmetic number, because the mean of its divisors is an integer number (123726).

2²⁴⁷⁴⁵¹ is an apocalyptic number.

247451 is a deficient number, since it is larger than the sum of its proper divisors (1).

247451 is an equidigital number, since it uses as much as digits as its factorization.

247451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 23.

The square root of 247451 is about 497.4444692627. Note that the first 4 decimals coincide. The cubic root of 247451 is about 62.7812180976.

The spelling of 247451 in words is "two hundred forty-seven thousand, four hundred fifty-one".