1420744609 has 4 divisors (see below), whose sum is σ = 1434022704. Its totient is φ = 1407466516.

The previous prime is 1420744561. The next prime is 1420744613. The reversal of 1420744609 is 9064470241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9064470241 = 57839 ⋅156719.

It is a cyclic number.

It is not a de Polignac number, because 1420744609 - 2⁹ = 1420744097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420744709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6638887 + ... + 6639100.

It is an arithmetic number, because the mean of its divisors is an integer number (358505676).

Almost surely, 2^1420744609 is an apocalyptic number.

It is an amenable number.

1420744609 is a deficient number, since it is larger than the sum of its proper divisors (13278095).

1420744609 is a wasteful number, since it uses less digits than its factorization.

1420744609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13278094.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1420744609 is about 37692.7660035716. The cubic root of 1420744609 is about 1124.1872935973.

The spelling of 1420744609 in words is "one billion, four hundred twenty million, seven hundred forty-four thousand, six hundred nine".