1420407 has 6 divisors (see below), whose sum is σ = 2051712. Its totient is φ = 946932.

The previous prime is 1420403. The next prime is 1420429. The reversal of 1420407 is 7040241.

It is a happy number.

It is not a de Polignac number, because 1420407 - 2² = 1420403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1420407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78903 + ... + 78920.

It is an arithmetic number, because the mean of its divisors is an integer number (341952).

2^1420407 is an apocalyptic number.

1420407 is a deficient number, since it is larger than the sum of its proper divisors (631305).

1420407 is a wasteful number, since it uses less digits than its factorization.

1420407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157829 (or 157826 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1420407 is about 1191.8082899527. The cubic root of 1420407 is about 112.4098240338.

Adding to 1420407 its reverse (7040241), we get a palindrome (8460648).

The spelling of 1420407 in words is "one million, four hundred twenty thousand, four hundred seven".