25511401 has 4 divisors (see below), whose sum is σ = 25674052. Its totient is φ = 25348752.

The previous prime is 25511399. The next prime is 25511413. The reversal of 25511401 is 10411552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2958400 + 22553001 = 1720^2 + 4749^2 .

It is a cyclic number.

It is not a de Polignac number, because 25511401 - 2¹ = 25511399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25511491) 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, 81090 + ... + 81403.

It is an arithmetic number, because the mean of its divisors is an integer number (6418513).

Almost surely, 2^25511401 is an apocalyptic number.

It is an amenable number.

25511401 is a deficient number, since it is larger than the sum of its proper divisors (162651).

25511401 is a wasteful number, since it uses less digits than its factorization.

25511401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162650.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 25511401 is about 5050.8812102444. The cubic root of 25511401 is about 294.3821253288.

Adding to 25511401 its reverse (10411552), we get a palindrome (35922953).

The spelling of 25511401 in words is "twenty-five million, five hundred eleven thousand, four hundred one".