1025404561 has 8 divisors (see below), whose sum is σ = 1075536000. Its totient is φ = 975735552.

The previous prime is 1025404553. The next prime is 1025404579. The reversal of 1025404561 is 1654045201.

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 1025404561 - 2³ = 1025404553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025404361) 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, 111061 + ... + 119938.

It is an arithmetic number, because the mean of its divisors is an integer number (134442000).

Almost surely, 2^1025404561 is an apocalyptic number.

It is an amenable number.

1025404561 is a deficient number, since it is larger than the sum of its proper divisors (50131439).

1025404561 is a wasteful number, since it uses less digits than its factorization.

1025404561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231215.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1025404561 is about 32021.9387451791. The cubic root of 1025404561 is about 1008.3974720731.

Adding to 1025404561 its reverse (1654045201), we get a palindrome (2679449762).

The spelling of 1025404561 in words is "one billion, twenty-five million, four hundred four thousand, five hundred sixty-one".