25040001 has 16 divisors (see below), whose sum is σ = 38334464. Its totient is φ = 14241744.

The previous prime is 25039999. The next prime is 25040017. The reversal of 25040001 is 10004052.

25040001 = T₃₅₈ + T₃₅₉ + ... + T₅₈₀.

It is not a de Polignac number, because 25040001 - 2¹ = 25039999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25040051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2010 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (2395904).

Almost surely, 2^25040001 is an apocalyptic number.

25040001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25040001 is a deficient number, since it is larger than the sum of its proper divisors (13294463).

25040001 is a wasteful number, since it uses less digits than its factorization.

25040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 25040001 is about 5003.9985011988. The cubic root of 25040001 is about 292.5576422303.

Adding to 25040001 its reverse (10004052), we get a palindrome (35044053).

The spelling of 25040001 in words is "twenty-five million, forty thousand, one".