1021505492 has 24 divisors (see below), whose sum is σ = 2051501760. Its totient is φ = 435968640.

The previous prime is 1021505491. The next prime is 1021505533. The reversal of 1021505492 is 2945051201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021505491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68942 + ... + 82437.

It is an arithmetic number, because the mean of its divisors is an integer number (85479240).

Almost surely, 2^1021505492 is an apocalyptic number.

It is an amenable number.

1021505492 is an abundant number, since it is smaller than the sum of its proper divisors (1029996268).

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

1021505492 is a wasteful number, since it uses less digits than its factorization.

1021505492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151631 (or 151629 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1021505492 is about 31960.9995463221. Note that the first 3 decimals coincide. The cubic root of 1021505492 is about 1007.1177152638.

Adding to 1021505492 its sum of digits (29), we get a square (1021505521 = 31961²).

Adding to 1021505492 its reverse (2945051201), we get a palindrome (3966556693).

The spelling of 1021505492 in words is "one billion, twenty-one million, five hundred five thousand, four hundred ninety-two".