1420340407 has 4 divisors (see below), whose sum is σ = 1420893720. Its totient is φ = 1419787096.

The previous prime is 1420340401. The next prime is 1420340419. The reversal of 1420340407 is 7040430241.

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 1420340407 - 2³ = 1420340399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420340401) 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, 272788 + ... + 277945.

It is an arithmetic number, because the mean of its divisors is an integer number (355223430).

Almost surely, 2^1420340407 is an apocalyptic number.

1420340407 is a deficient number, since it is larger than the sum of its proper divisors (553313).

1420340407 is an equidigital number, since it uses as much as digits as its factorization.

1420340407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553312.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 1420340407 is about 37687.4038240896. The cubic root of 1420340407 is about 1124.0806730153.

Adding to 1420340407 its reverse (7040430241), we get a palindrome (8460770648).

The spelling of 1420340407 in words is "one billion, four hundred twenty million, three hundred forty thousand, four hundred seven".