1021520732 has 6 divisors (see below), whose sum is σ = 1787661288. Its totient is φ = 510760364.

The previous prime is 1021520683. The next prime is 1021520777. The reversal of 1021520732 is 2370251201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021520698 and 1021520707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127690088 + ... + 127690095.

It is an arithmetic number, because the mean of its divisors is an integer number (297943548).

Almost surely, 2^1021520732 is an apocalyptic number.

It is an amenable number.

1021520732 is a deficient number, since it is larger than the sum of its proper divisors (766140556).

1021520732 is a wasteful number, since it uses less digits than its factorization.

1021520732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255380187 (or 255380185 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1021520732 is about 31961.2379610052. The cubic root of 1021520732 is about 1007.1227236878.

Adding to 1021520732 its reverse (2370251201), we get a palindrome (3391771933).

The spelling of 1021520732 in words is "one billion, twenty-one million, five hundred twenty thousand, seven hundred thirty-two".