1390947 has 4 divisors (see below), whose sum is σ = 1854600. Its totient is φ = 927296.

The previous prime is 1390937. The next prime is 1390967. The reversal of 1390947 is 7490931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1390947 - 2⁴ = 1390931 is a prime.

It is a super-3 number, since 3×1390947³ = 8073335509928424369, which contains 333 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1390937) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 231822 + ... + 231827.

It is an arithmetic number, because the mean of its divisors is an integer number (463650).

2^1390947 is an apocalyptic number.

1390947 is a deficient number, since it is larger than the sum of its proper divisors (463653).

1390947 is an equidigital number, since it uses as much as digits as its factorization.

1390947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463652.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1390947 is about 1179.3841613317. The cubic root of 1390947 is about 111.6272418434.

The spelling of 1390947 in words is "one million, three hundred ninety thousand, nine hundred forty-seven".