4120978 has 4 divisors (see below), whose sum is σ = 6181470. Its totient is φ = 2060488.

The previous prime is 4120957. The next prime is 4120981. The reversal of 4120978 is 8790214.

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., 2948089 + 1172889 = 1717^2 + 1083^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030243 + ... + 1030246.

Almost surely, 2^4120978 is an apocalyptic number.

4120978 is a deficient number, since it is larger than the sum of its proper divisors (2060492).

4120978 is a wasteful number, since it uses less digits than its factorization.

4120978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060491.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 4120978 is about 2030.0192117318. The cubic root of 4120978 is about 160.3245754969.

The spelling of 4120978 in words is "four million, one hundred twenty thousand, nine hundred seventy-eight".