1421315001543 has 4 divisors (see below), whose sum is σ = 1895086668728. Its totient is φ = 947543334360.

The previous prime is 1421315001539. The next prime is 1421315001553. The reversal of 1421315001543 is 3451005131241.

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

It is not a de Polignac number, because 1421315001543 - 2² = 1421315001539 is a prime.

It is a super-2 number, since 2×1421315001543² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421315001543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421315001553) 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, 236885833588 + ... + 236885833593.

It is an arithmetic number, because the mean of its divisors is an integer number (473771667182).

Almost surely, 2^{1421315001543} is an apocalyptic number.

1421315001543 is a deficient number, since it is larger than the sum of its proper divisors (473771667185).

1421315001543 is an equidigital number, since it uses as much as digits as its factorization.

1421315001543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473771667184.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 1421315001543 in words is "one trillion, four hundred twenty-one billion, three hundred fifteen million, one thousand, five hundred forty-three".