1421707 has 8 divisors (see below), whose sum is σ = 1645056. Its totient is φ = 1203432.

The previous prime is 1421689. The next prime is 1421711. The reversal of 1421707 is 7071241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421737) 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 7 ways as a sum of consecutive naturals, for example, 643 + ... + 1804.

It is an arithmetic number, because the mean of its divisors is an integer number (205632).

2^1421707 is an apocalyptic number.

1421707 is a deficient number, since it is larger than the sum of its proper divisors (223349).

1421707 is an equidigital number, since it uses as much as digits as its factorization.

1421707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 1421707 is about 1192.3535549492. The cubic root of 1421707 is about 112.4441072151. Note that the first 3 decimals are identical.

Adding to 1421707 its reverse (7071241), we get a palindrome (8492948).

It can be divided in two parts, 142 and 1707, that added together give a square (1849 = 43²).

The spelling of 1421707 in words is "one million, four hundred twenty-one thousand, seven hundred seven".