1025044401 has 4 divisors (see below), whose sum is σ = 1366725872. Its totient is φ = 683362932.

The previous prime is 1025044399. The next prime is 1025044409. The reversal of 1025044401 is 1044405201.

It is a happy number.

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 not a de Polignac number, because 1025044401 - 2¹ = 1025044399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025044409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170840731 + ... + 170840736.

It is an arithmetic number, because the mean of its divisors is an integer number (341681468).

Almost surely, 2^1025044401 is an apocalyptic number.

It is an amenable number.

1025044401 is a deficient number, since it is larger than the sum of its proper divisors (341681471).

1025044401 is an equidigital number, since it uses as much as digits as its factorization.

1025044401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341681470.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1025044401 is about 32016.3146067751. The cubic root of 1025044401 is about 1008.2793960873.

Adding to 1025044401 its reverse (1044405201), we get a palindrome (2069449602).

The spelling of 1025044401 in words is "one billion, twenty-five million, forty-four thousand, four hundred one".