521852742 has 24 divisors (see below), whose sum is σ = 1131188760. Its totient is φ = 173872800.

The previous prime is 521852741. The next prime is 521852761. The reversal of 521852742 is 247258125.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 521852697 and 521852706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521852741) 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 in 11 ways as a sum of consecutive naturals, for example, 46234 + ... + 56402.

It is an arithmetic number, because the mean of its divisors is an integer number (47132865).

Almost surely, 2^521852742 is an apocalyptic number.

521852742 is an abundant number, since it is smaller than the sum of its proper divisors (609336018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521852742 is a wasteful number, since it uses less digits than its factorization.

521852742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13028 (or 13025 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 521852742 is about 22844.0964364975. The cubic root of 521852742 is about 805.0990668043.

The spelling of 521852742 in words is "five hundred twenty-one million, eight hundred fifty-two thousand, seven hundred forty-two".