245421049 has 2 divisors, whose sum is σ = 245421050. Its totient is φ = 245421048.

The previous prime is 245421047. The next prime is 245421053. The reversal of 245421049 is 940124542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221801449 + 23619600 = 14893^2 + 4860^2 .

It is a cyclic number.

It is not a de Polignac number, because 245421049 - 2¹ = 245421047 is a prime.

Together with 245421047, it forms a pair of twin primes.

It is equal to p_13442485 and since 245421049 and 13442485 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245421049.

It is not a weakly prime, because it can be changed into another prime (245421047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122710524 + 122710525.

It is an arithmetic number, because the mean of its divisors is an integer number (122710525).

Almost surely, 2^245421049 is an apocalyptic number.

It is an amenable number.

245421049 is a deficient number, since it is larger than the sum of its proper divisors (1).

245421049 is an equidigital number, since it uses as much as digits as its factorization.

245421049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 245421049 is about 15665.9199857525. The cubic root of 245421049 is about 626.0907238869.

The spelling of 245421049 in words is "two hundred forty-five million, four hundred twenty-one thousand, forty-nine".