1423401221 has 4 divisors (see below), whose sum is σ = 1552801344. Its totient is φ = 1294001100.

The previous prime is 1423401209. The next prime is 1423401227. The reversal of 1423401221 is 1221043241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1423401221 - 2¹⁸ = 1423139077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1423401193 and 1423401202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423401227) 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, 64700045 + ... + 64700066.

It is an arithmetic number, because the mean of its divisors is an integer number (388200336).

Almost surely, 2^1423401221 is an apocalyptic number.

1423401221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1423401221 is a deficient number, since it is larger than the sum of its proper divisors (129400123).

1423401221 is a wasteful number, since it uses less digits than its factorization.

1423401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129400122.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1423401221 is about 37727.9898881454. The cubic root of 1423401221 is about 1124.8875531396.

Adding to 1423401221 its reverse (1221043241), we get a palindrome (2644444462).

The spelling of 1423401221 in words is "one billion, four hundred twenty-three million, four hundred one thousand, two hundred twenty-one".