921259542 has 16 divisors (see below), whose sum is σ = 2105736192. Its totient is φ = 263217000.

The previous prime is 921259513. The next prime is 921259543. The reversal of 921259542 is 245952129.

It is a self number, because there is not a number n which added to its sum of digits gives 921259542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921259543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10967334 + ... + 10967417.

It is an arithmetic number, because the mean of its divisors is an integer number (131608512).

Almost surely, 2^921259542 is an apocalyptic number.

921259542 is an abundant number, since it is smaller than the sum of its proper divisors (1184476650).

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

921259542 is a wasteful number, since it uses less digits than its factorization.

921259542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21934763.

The product of its digits is 64800, while the sum is 39.

The square root of 921259542 is about 30352.2576096079. The cubic root of 921259542 is about 973.0324703699.

The spelling of 921259542 in words is "nine hundred twenty-one million, two hundred fifty-nine thousand, five hundred forty-two".