1421972743 has 4 divisors (see below), whose sum is σ = 1429829128. Its totient is φ = 1414116360.

The previous prime is 1421972737. The next prime is 1421972791. The reversal of 1421972743 is 3472791241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421972743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421972696 and 1421972705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421972443) 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 3 ways as a sum of consecutive naturals, for example, 3927921 + ... + 3928282.

It is an arithmetic number, because the mean of its divisors is an integer number (357457282).

Almost surely, 2^1421972743 is an apocalyptic number.

1421972743 is a deficient number, since it is larger than the sum of its proper divisors (7856385).

1421972743 is an equidigital number, since it uses as much as digits as its factorization.

1421972743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856384.

The product of its digits is 84672, while the sum is 40.

The square root of 1421972743 is about 37709.0538597828. The cubic root of 1421972743 is about 1124.5111273096.

The spelling of 1421972743 in words is "one billion, four hundred twenty-one million, nine hundred seventy-two thousand, seven hundred forty-three".