25401402 has 24 divisors (see below), whose sum is σ = 59270484. Its totient is φ = 7815744.

The previous prime is 25401391. The next prime is 25401443. The reversal of 25401402 is 20410452.

It can be written as a sum of positive squares in 2 ways, for example, as 24710841 + 690561 = 4971^2 + 831^2 .

It is a super-3 number, since 3×25401402³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 54043 + ... + 54510.

Almost surely, 2^25401402 is an apocalyptic number.

25401402 is an abundant number, since it is smaller than the sum of its proper divisors (33869082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25401402 is a wasteful number, since it uses less digits than its factorization.

25401402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108574 (or 108571 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25401402 is about 5039.9803571046. The cubic root of 25401402 is about 293.9584142208.

Adding to 25401402 its reverse (20410452), we get a palindrome (45811854).

The spelling of 25401402 in words is "twenty-five million, four hundred one thousand, four hundred two".