25491098 has 4 divisors (see below), whose sum is σ = 38236650. Its totient is φ = 12745548.

The previous prime is 25491097. The next prime is 25491101. The reversal of 25491098 is 89019452.

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

It can be written as a sum of positive squares in only one way, i.e., 21967969 + 3523129 = 4687^2 + 1877^2 .

It is not an unprimeable number, because it can be changed into a prime (25491097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6372773 + ... + 6372776.

Almost surely, 2^25491098 is an apocalyptic number.

25491098 is a deficient number, since it is larger than the sum of its proper divisors (12745552).

25491098 is a wasteful number, since it uses less digits than its factorization.

25491098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12745551.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 25491098 is about 5048.8709628985. The cubic root of 25491098 is about 294.3040108873.

The spelling of 25491098 in words is "twenty-five million, four hundred ninety-one thousand, ninety-eight".