742528538 has 4 divisors (see below), whose sum is σ = 1113792810. Its totient is φ = 371264268.

The previous prime is 742528529. The next prime is 742528547. The reversal of 742528538 is 835825247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835825247 = 17 ⋅49166191.

It is an interprime number because it is at equal distance from previous prime (742528529) and next prime (742528547).

It can be written as a sum of positive squares in only one way, i.e., 417916249 + 324612289 = 20443^2 + 18017^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185632133 + ... + 185632136.

Almost surely, 2^742528538 is an apocalyptic number.

742528538 is a deficient number, since it is larger than the sum of its proper divisors (371264272).

742528538 is a wasteful number, since it uses less digits than its factorization.

742528538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371264271.

The product of its digits is 537600, while the sum is 44.

The square root of 742528538 is about 27249.3768369113. The cubic root of 742528538 is about 905.5332116171.

The spelling of 742528538 in words is "seven hundred forty-two million, five hundred twenty-eight thousand, five hundred thirty-eight".