25778042 has 8 divisors (see below), whose sum is σ = 40000500. Its totient is φ = 12444544.

The previous prime is 25778029. The next prime is 25778047. The reversal of 25778042 is 24087752.

It can be written as a sum of positive squares in 2 ways, for example, as 25715041 + 63001 = 5071^2 + 251^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25777993 and 25778011.

It is not an unprimeable number, because it can be changed into a prime (25778047) 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, 222167 + ... + 222282.

Almost surely, 2^25778042 is an apocalyptic number.

25778042 is a deficient number, since it is larger than the sum of its proper divisors (14222458).

25778042 is a wasteful number, since it uses less digits than its factorization.

25778042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444480.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 25778042 is about 5077.2080910674. The cubic root of 25778042 is about 295.4041840703.

The spelling of 25778042 in words is "twenty-five million, seven hundred seventy-eight thousand, forty-two".