1421243503 has 8 divisors (see below), whose sum is σ = 1514948400. Its totient is φ = 1328661120.

The previous prime is 1421243471. The next prime is 1421243569. The reversal of 1421243503 is 3053421241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421243503 - 2⁵ = 1421243471 is a prime.

It is a super-2 number, since 2×1421243503² = 4039866189639422018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421243573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278013 + ... + 283078.

It is an arithmetic number, because the mean of its divisors is an integer number (189368550).

Almost surely, 2^1421243503 is an apocalyptic number.

1421243503 is a deficient number, since it is larger than the sum of its proper divisors (93704897).

1421243503 is a wasteful number, since it uses less digits than its factorization.

1421243503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561257.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1421243503 is about 37699.3833238688. The cubic root of 1421243503 is about 1124.3188641971.

Adding to 1421243503 its reverse (3053421241), we get a palindrome (4474664744).

The spelling of 1421243503 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, five hundred three".