1424722921 has 4 divisors (see below), whose sum is σ = 1426287744. Its totient is φ = 1423158100.

The previous prime is 1424722903. The next prime is 1424722931. The reversal of 1424722921 is 1292274241.

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 1424722921 - 2¹¹ = 1424720873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1424722931) 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, 781045 + ... + 782866.

It is an arithmetic number, because the mean of its divisors is an integer number (356571936).

Almost surely, 2^1424722921 is an apocalyptic number.

It is an amenable number.

1424722921 is a deficient number, since it is larger than the sum of its proper divisors (1564823).

1424722921 is an equidigital number, since it uses as much as digits as its factorization.

1424722921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564822.

The product of its digits is 16128, while the sum is 34.

The square root of 1424722921 is about 37745.5019969267. The cubic root of 1424722921 is about 1125.2356170857.

The spelling of 1424722921 in words is "one billion, four hundred twenty-four million, seven hundred twenty-two thousand, nine hundred twenty-one".