1025944921 has 4 divisors (see below), whose sum is σ = 1026237712. Its totient is φ = 1025652132.

The previous prime is 1025944873. The next prime is 1025945021. The reversal of 1025944921 is 1294495201.

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.

It is a cyclic number.

It is not a de Polignac number, because 1025944921 - 2¹¹ = 1025942873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025941921) 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, 141075 + ... + 148168.

It is an arithmetic number, because the mean of its divisors is an integer number (256559428).

Almost surely, 2^1025944921 is an apocalyptic number.

It is an amenable number.

1025944921 is a deficient number, since it is larger than the sum of its proper divisors (292791).

1025944921 is an equidigital number, since it uses as much as digits as its factorization.

1025944921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292790.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1025944921 is about 32030.3749743895. The cubic root of 1025944921 is about 1008.5745735448.

The spelling of 1025944921 in words is "one billion, twenty-five million, nine hundred forty-four thousand, nine hundred twenty-one".