525742939 has 4 divisors (see below), whose sum is σ = 553413640. Its totient is φ = 498072240.

The previous prime is 525742927. The next prime is 525742961. The reversal of 525742939 is 939247525.

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

It is a cyclic number.

It is not a de Polignac number, because 525742939 - 2¹³ = 525734747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525742979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13835322 + ... + 13835359.

It is an arithmetic number, because the mean of its divisors is an integer number (138353410).

Almost surely, 2^525742939 is an apocalyptic number.

525742939 is a deficient number, since it is larger than the sum of its proper divisors (27670701).

525742939 is a wasteful number, since it uses less digits than its factorization.

525742939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27670700.

The product of its digits is 680400, while the sum is 46.

The square root of 525742939 is about 22929.0850013689. The cubic root of 525742939 is about 807.0946766895.

The spelling of 525742939 in words is "five hundred twenty-five million, seven hundred forty-two thousand, nine hundred thirty-nine".