1025644201 has 4 divisors (see below), whose sum is σ = 1025829504. Its totient is φ = 1025458900.

The previous prime is 1025644183. The next prime is 1025644211. The reversal of 1025644201 is 1024465201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1024465201 = 601 ⋅1704601.

It is a cyclic number.

It is not a de Polignac number, because 1025644201 - 2¹¹ = 1025642153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025644211) 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, 84085 + ... + 95506.

It is an arithmetic number, because the mean of its divisors is an integer number (256457376).

Almost surely, 2^1025644201 is an apocalyptic number.

It is an amenable number.

1025644201 is a deficient number, since it is larger than the sum of its proper divisors (185303).

1025644201 is an equidigital number, since it uses as much as digits as its factorization.

1025644201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185302.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1025644201 is about 32025.6803362552. The cubic root of 1025644201 is about 1008.4760210858.

The spelling of 1025644201 in words is "one billion, twenty-five million, six hundred forty-four thousand, two hundred one".