1240978 has 8 divisors (see below), whose sum is σ = 1867068. Its totient is φ = 618624.

The previous prime is 1240973. The next prime is 1240979. The reversal of 1240978 is 8790421.

1240978 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 2209 = 1113^2 + 47^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1240973) 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, 150 + ... + 1582.

2^1240978 is an apocalyptic number.

1240978 is a deficient number, since it is larger than the sum of its proper divisors (626090).

1240978 is a wasteful number, since it uses less digits than its factorization.

1240978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868.

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

The square root of 1240978 is about 1113.9919209761. The cubic root of 1240978 is about 107.4619443447.

The spelling of 1240978 in words is "one million, two hundred forty thousand, nine hundred seventy-eight".