5261978 has 4 divisors (see below), whose sum is σ = 7892970. Its totient is φ = 2630988.

The previous prime is 5261957. The next prime is 5261983. The reversal of 5261978 is 8791625.

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., 4255969 + 1006009 = 2063^2 + 1003^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315493 + ... + 1315496.

Almost surely, 2^5261978 is an apocalyptic number.

5261978 is a deficient number, since it is larger than the sum of its proper divisors (2630992).

5261978 is a wasteful number, since it uses less digits than its factorization.

5261978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630991.

The product of its digits is 30240, while the sum is 38.

The square root of 5261978 is about 2293.9001721958. The cubic root of 5261978 is about 173.9334091422.

The spelling of 5261978 in words is "five million, two hundred sixty-one thousand, nine hundred seventy-eight".