25720069 has 8 divisors (see below), whose sum is σ = 26481440. Its totient is φ = 24962256.

The previous prime is 25720061. The next prime is 25720073. The reversal of 25720069 is 96002752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25720069 - 2³ = 25720061 is a prime.

It is a super-2 number, since 2×25720069² = 1323043898729522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25720069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22342 + ... + 23464.

It is an arithmetic number, because the mean of its divisors is an integer number (3310180).

Almost surely, 2^25720069 is an apocalyptic number.

It is an amenable number.

25720069 is a deficient number, since it is larger than the sum of its proper divisors (761371).

25720069 is a wasteful number, since it uses less digits than its factorization.

25720069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 25720069 is about 5071.4957359738. The cubic root of 25720069 is about 295.1825701244.

The spelling of 25720069 in words is "twenty-five million, seven hundred twenty thousand, sixty-nine".