521141247 has 24 divisors (see below), whose sum is σ = 826447440. Its totient is φ = 313822080.

The previous prime is 521141237. The next prime is 521141249. The reversal of 521141247 is 742141125.

521141247 is a `hidden beast` number, since 521 + 14 + 124 + 7 = 666.

It is not a de Polignac number, because 521141247 - 2⁶ = 521141183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521141247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521141249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1222 + ... + 32307.

It is an arithmetic number, because the mean of its divisors is an integer number (34435310).

Almost surely, 2^521141247 is an apocalyptic number.

521141247 is a deficient number, since it is larger than the sum of its proper divisors (305306193).

521141247 is a wasteful number, since it uses less digits than its factorization.

521141247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33703 (or 33700 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 521141247 is about 22828.5182830599. The cubic root of 521141247 is about 804.7330092038.

It can be divided in two parts, 52114 and 1247, that added together give a square (53361 = 231²).

The spelling of 521141247 in words is "five hundred twenty-one million, one hundred forty-one thousand, two hundred forty-seven".