521087134 has 4 divisors (see below), whose sum is σ = 781630704. Its totient is φ = 260543566.

The previous prime is 521087131. The next prime is 521087143. The reversal of 521087134 is 431780125.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 521087096 and 521087105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521087131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130271782 + ... + 130271785.

It is an arithmetic number, because the mean of its divisors is an integer number (195407676).

Almost surely, 2^521087134 is an apocalyptic number.

521087134 is a deficient number, since it is larger than the sum of its proper divisors (260543570).

521087134 is a wasteful number, since it uses less digits than its factorization.

521087134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260543569.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 521087134 is about 22827.3330461532. Note that the first 3 decimals coincide. The cubic root of 521087134 is about 804.7051549354.

The spelling of 521087134 in words is "five hundred twenty-one million, eighty-seven thousand, one hundred thirty-four".