1025558901 has 48 divisors (see below), whose sum is σ = 1598717120. Its totient is φ = 656449920.

The previous prime is 1025558899. The next prime is 1025558923. The reversal of 1025558901 is 1098555201.

It is a happy number.

1025558901 is a `hidden beast` number, since 10 + 2 + 5 + 558 + 90 + 1 = 666.

1025558901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1025558901 - 2¹ = 1025558899 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 (1025558101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636585 + ... + 638193.

Almost surely, 2^1025558901 is an apocalyptic number.

It is an amenable number.

1025558901 is a deficient number, since it is larger than the sum of its proper divisors (573158219).

1025558901 is an equidigital number, since it uses as much as digits as its factorization.

1025558901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 1025558901 is about 32024.3485648030. The cubic root of 1025558901 is about 1008.4480629208.

The spelling of 1025558901 in words is "one billion, twenty-five million, five hundred fifty-eight thousand, nine hundred one".