25870403 has 4 divisors (see below), whose sum is σ = 27860448. Its totient is φ = 23880360.

The previous prime is 25870393. The next prime is 25870409. The reversal of 25870403 is 30407852.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25870403 - 2¹⁰ = 25869379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25870409) 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, 995003 + ... + 995028.

It is an arithmetic number, because the mean of its divisors is an integer number (6965112).

Almost surely, 2^25870403 is an apocalyptic number.

25870403 is a deficient number, since it is larger than the sum of its proper divisors (1990045).

25870403 is a wasteful number, since it uses less digits than its factorization.

25870403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990044.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25870403 is about 5086.2956068243. The cubic root of 25870403 is about 295.7565680253.

The spelling of 25870403 in words is "twenty-five million, eight hundred seventy thousand, four hundred three".