521141249 has 2 divisors, whose sum is σ = 521141250. Its totient is φ = 521141248.

The previous prime is 521141237. The next prime is 521141251. The reversal of 521141249 is 942141125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403809025 + 117332224 = 20095^2 + 10832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521141249 is a prime.

Together with 521141251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521111249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260570624 + 260570625.

It is an arithmetic number, because the mean of its divisors is an integer number (260570625).

Almost surely, 2^521141249 is an apocalyptic number.

It is an amenable number.

521141249 is a deficient number, since it is larger than the sum of its proper divisors (1).

521141249 is an equidigital number, since it uses as much as digits as its factorization.

521141249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 521141249 is about 22828.5183268648. The cubic root of 521141249 is about 804.7330102333.

The spelling of 521141249 in words is "five hundred twenty-one million, one hundred forty-one thousand, two hundred forty-nine".