1228514421 has 4 divisors (see below), whose sum is σ = 1638019232. Its totient is φ = 819009612.

The previous prime is 1228514383. The next prime is 1228514431. The reversal of 1228514421 is 1244158221.

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 not a de Polignac number, because 1228514421 - 2¹⁷ = 1228383349 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 (1228514431) 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, 204752401 + ... + 204752406.

It is an arithmetic number, because the mean of its divisors is an integer number (409504808).

Almost surely, 2^1228514421 is an apocalyptic number.

It is an amenable number.

1228514421 is a deficient number, since it is larger than the sum of its proper divisors (409504811).

1228514421 is an equidigital number, since it uses as much as digits as its factorization.

1228514421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409504810.

The product of its digits is 5120, while the sum is 30.

The square root of 1228514421 is about 35050.1700566488. The cubic root of 1228514421 is about 1071.0097380115.

The spelling of 1228514421 in words is "one billion, two hundred twenty-eight million, five hundred fourteen thousand, four hundred twenty-one".