1406978 has 4 divisors (see below), whose sum is σ = 2110470. Its totient is φ = 703488.

The previous prime is 1406959. The next prime is 1406983. The reversal of 1406978 is 8796041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8796041 = 2699 ⋅3259.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 339889 = 1033^2 + 583^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351743 + ... + 351746.

2^1406978 is an apocalyptic number.

1406978 is a deficient number, since it is larger than the sum of its proper divisors (703492).

1406978 is an equidigital number, since it uses as much as digits as its factorization.

1406978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703491.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1406978 is about 1186.1610345986. The cubic root of 1406978 is about 112.0544484407.

The spelling of 1406978 in words is "one million, four hundred six thousand, nine hundred seventy-eight".