921528742 has 4 divisors (see below), whose sum is σ = 1382293116. Its totient is φ = 460764370.

The previous prime is 921528733. The next prime is 921528799. The reversal of 921528742 is 247825129.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 921528695 and 921528704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230382184 + ... + 230382187.

It is an arithmetic number, because the mean of its divisors is an integer number (345573279).

Almost surely, 2^921528742 is an apocalyptic number.

921528742 is a deficient number, since it is larger than the sum of its proper divisors (460764374).

921528742 is a wasteful number, since it uses less digits than its factorization.

921528742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460764373.

The product of its digits is 80640, while the sum is 40.

The square root of 921528742 is about 30356.6918816922. The cubic root of 921528742 is about 973.1272373056.

The spelling of 921528742 in words is "nine hundred twenty-one million, five hundred twenty-eight thousand, seven hundred forty-two".