25420101 has 16 divisors (see below), whose sum is σ = 38964864. Its totient is φ = 14439744.

The previous prime is 25420099. The next prime is 25420139. The reversal of 25420101 is 10102452.

It is not a de Polignac number, because 25420101 - 2¹ = 25420099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25420601) 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, 135 + ... + 7131.

It is an arithmetic number, because the mean of its divisors is an integer number (2435304).

Almost surely, 2^25420101 is an apocalyptic number.

25420101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25420101 is a deficient number, since it is larger than the sum of its proper divisors (13544763).

25420101 is a wasteful number, since it uses less digits than its factorization.

25420101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25420101 is about 5041.8350825865. The cubic root of 25420101 is about 294.0305280901.

Adding to 25420101 its reverse (10102452), we get a palindrome (35522553).

The spelling of 25420101 in words is "twenty-five million, four hundred twenty thousand, one hundred one".