1025121641 has 8 divisors (see below), whose sum is σ = 1101624480. Its totient is φ = 950419008.

The previous prime is 1025121599. The next prime is 1025121679. The reversal of 1025121641 is 1461215201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025121641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025121241) 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, 448871 + ... + 451148.

It is an arithmetic number, because the mean of its divisors is an integer number (137703060).

Almost surely, 2^1025121641 is an apocalyptic number.

It is an amenable number.

1025121641 is a deficient number, since it is larger than the sum of its proper divisors (76502839).

1025121641 is an equidigital number, since it uses as much as digits as its factorization.

1025121641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900103.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1025121641 is about 32017.5208440629. The cubic root of 1025121641 is about 1008.3047210210.

Adding to 1025121641 its reverse (1461215201), we get a palindrome (2486336842).

The spelling of 1025121641 in words is "one billion, twenty-five million, one hundred twenty-one thousand, six hundred forty-one".