1025321421 has 8 divisors (see below), whose sum is σ = 1369881504. Its totient is φ = 682154480.

The previous prime is 1025321413. The next prime is 1025321461. The reversal of 1025321421 is 1241235201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025321421 - 2³ = 1025321413 is a prime.

It is a super-2 number, since 2×1025321421² = 2102568032722918482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025321461) 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 7 ways as a sum of consecutive naturals, for example, 346566 + ... + 349511.

It is an arithmetic number, because the mean of its divisors is an integer number (171235188).

Almost surely, 2^1025321421 is an apocalyptic number.

It is an amenable number.

1025321421 is a deficient number, since it is larger than the sum of its proper divisors (344560083).

1025321421 is an equidigital number, since it uses as much as digits as its factorization.

1025321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696571.

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

The square root of 1025321421 is about 32020.6405463726. The cubic root of 1025321421 is about 1008.3702176492.

Adding to 1025321421 its reverse (1241235201), we get a palindrome (2266556622).

The spelling of 1025321421 in words is "one billion, twenty-five million, three hundred twenty-one thousand, four hundred twenty-one".