1021532461 has 4 divisors (see below), whose sum is σ = 1026032832. Its totient is φ = 1017032092.

The previous prime is 1021532437. The next prime is 1021532497. The reversal of 1021532461 is 1642351201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1642351201 = 31 ⋅52979071.

It is a cyclic number.

It is not a de Polignac number, because 1021532461 - 2⁹ = 1021531949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021532401) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2249845 + ... + 2250298.

It is an arithmetic number, because the mean of its divisors is an integer number (256508208).

Almost surely, 2^1021532461 is an apocalyptic number.

It is an amenable number.

1021532461 is a deficient number, since it is larger than the sum of its proper divisors (4500371).

1021532461 is an equidigital number, since it uses as much as digits as its factorization.

1021532461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500370.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1021532461 is about 31961.4214483649. The cubic root of 1021532461 is about 1007.1265782342.

Adding to 1021532461 its reverse (1642351201), we get a palindrome (2663883662).

The spelling of 1021532461 in words is "one billion, twenty-one million, five hundred thirty-two thousand, four hundred sixty-one".