1021421532 has 24 divisors (see below), whose sum is σ = 2508755200. Its totient is φ = 322554096.

The previous prime is 1021421507. The next prime is 1021421537. The reversal of 1021421532 is 2351241201.

It is a junction number, because it is equal to n+sod(n) for n = 1021421499 and 1021421508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021421537) 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, 2239732 + ... + 2240187.

Almost surely, 2^1021421532 is an apocalyptic number.

1021421532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021421532 is an abundant number, since it is smaller than the sum of its proper divisors (1487333668).

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

1021421532 is a wasteful number, since it uses less digits than its factorization.

1021421532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479945 (or 4479943 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1021421532 is about 31959.6860435143. The cubic root of 1021421532 is about 1007.0901220299.

Adding to 1021421532 its reverse (2351241201), we get a palindrome (3372662733).

The spelling of 1021421532 in words is "one billion, twenty-one million, four hundred twenty-one thousand, five hundred thirty-two".