245342621 has 2 divisors, whose sum is σ = 245342622. Its totient is φ = 245342620.

The previous prime is 245342599. The next prime is 245342641. The reversal of 245342621 is 126243542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239042521 + 6300100 = 15461^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 245342621 - 2⁶ = 245342557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245342641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122671310 + 122671311.

It is an arithmetic number, because the mean of its divisors is an integer number (122671311).

Almost surely, 2^245342621 is an apocalyptic number.

It is an amenable number.

245342621 is a deficient number, since it is larger than the sum of its proper divisors (1).

245342621 is an equidigital number, since it uses as much as digits as its factorization.

245342621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 29.

The square root of 245342621 is about 15663.4166451640. The cubic root of 245342621 is about 626.0240245350.

The spelling of 245342621 in words is "two hundred forty-five million, three hundred forty-two thousand, six hundred twenty-one".