25305105 has 32 divisors (see below), whose sum is σ = 46464768. Its totient is φ = 11520000.

The previous prime is 25305101. The next prime is 25305109. The reversal of 25305105 is 50150352.

It is an interprime number because it is at equal distance from previous prime (25305101) and next prime (25305109).

It is not a de Polignac number, because 25305105 - 2² = 25305101 is a prime.

It is a super-2 number, since 2×25305105² = 1280696678122050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (25305101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41805 + ... + 42405.

It is an arithmetic number, because the mean of its divisors is an integer number (1452024).

Almost surely, 2^25305105 is an apocalyptic number.

It is an amenable number.

25305105 is a deficient number, since it is larger than the sum of its proper divisors (21159663).

25305105 is a wasteful number, since it uses less digits than its factorization.

25305105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 25305105 is about 5030.4179746816. The cubic root of 25305105 is about 293.5864772695.

Adding to 25305105 its reverse (50150352), we get a palindrome (75455457).

The spelling of 25305105 in words is "twenty-five million, three hundred five thousand, one hundred five".