1420365243 has 16 divisors (see below), whose sum is σ = 2067011712. Its totient is φ = 860400000.

The previous prime is 1420365229. The next prime is 1420365251. The reversal of 1420365243 is 3425630241.

It is not a de Polignac number, because 1420365243 - 2⁹ = 1420364731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1420365243.

It is not an unprimeable number, because it can be changed into a prime (1420365043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64723 + ... + 83843.

It is an arithmetic number, because the mean of its divisors is an integer number (129188232).

Almost surely, 2^1420365243 is an apocalyptic number.

1420365243 is a deficient number, since it is larger than the sum of its proper divisors (646646469).

1420365243 is a wasteful number, since it uses less digits than its factorization.

1420365243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21386.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1420365243 is about 37687.7333226608. The cubic root of 1420365243 is about 1124.0872248495.

Adding to 1420365243 its reverse (3425630241), we get a palindrome (4845995484).

It can be divided in two parts, 1420 and 365243, that added together give a palindrome (366663).

The spelling of 1420365243 in words is "one billion, four hundred twenty million, three hundred sixty-five thousand, two hundred forty-three".