78241925 has 6 divisors (see below), whose sum is σ = 97020018. Its totient is φ = 62593520.

The previous prime is 78241903. The next prime is 78241937. The reversal of 78241925 is 52914287.

It can be written as a sum of positive squares in 3 ways, for example, as 15737089 + 62504836 = 3967^2 + 7906^2 .

It is not a de Polignac number, because 78241925 - 2¹² = 78237829 is a prime.

It is a super-2 number, since 2×78241925² = 12243597655411250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 1564814 + ... + 1564863.

It is an arithmetic number, because the mean of its divisors is an integer number (16170003).

Almost surely, 2^78241925 is an apocalyptic number.

It is an amenable number.

78241925 is a deficient number, since it is larger than the sum of its proper divisors (18778093).

78241925 is a wasteful number, since it uses less digits than its factorization.

78241925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129687 (or 3129682 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 78241925 is about 8845.4465687155. The cubic root of 78241925 is about 427.7071485624.

The spelling of 78241925 in words is "seventy-eight million, two hundred forty-one thousand, nine hundred twenty-five".