1421026421 has 16 divisors (see below), whose sum is σ = 1482364800. Its totient is φ = 1361184000.

The previous prime is 1421026417. The next prime is 1421026427. The reversal of 1421026421 is 1246201241.

It is a cyclic number.

It is not a de Polignac number, because 1421026421 - 2² = 1421026417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421026427) 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, 549710 + ... + 552288.

It is an arithmetic number, because the mean of its divisors is an integer number (92647800).

Almost surely, 2^1421026421 is an apocalyptic number.

It is an amenable number.

1421026421 is a deficient number, since it is larger than the sum of its proper divisors (61338379).

1421026421 is a wasteful number, since it uses less digits than its factorization.

1421026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1421026421 is about 37696.5040952076. The cubic root of 1421026421 is about 1124.2616181271.

Adding to 1421026421 its reverse (1246201241), we get a palindrome (2667227662).

The spelling of 1421026421 in words is "one billion, four hundred twenty-one million, twenty-six thousand, four hundred twenty-one".