1234622021 has 6 divisors (see below), whose sum is σ = 1237434822. Its totient is φ = 1231815560.

The previous prime is 1234622009. The next prime is 1234622029. The reversal of 1234622021 is 1202264321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 969388225 + 265233796 = 31135^2 + 16286^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1234622021 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 (1234622029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226751 + ... + 232131.

It is an arithmetic number, because the mean of its divisors is an integer number (206239137).

Almost surely, 2^1234622021 is an apocalyptic number.

It is an amenable number.

1234622021 is a deficient number, since it is larger than the sum of its proper divisors (2812801).

1234622021 is an frugal number, since it uses more digits than its factorization.

1234622021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339 (or 5860 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1234622021 is about 35137.1885756388. The cubic root of 1234622021 is about 1072.7816582838.

Adding to 1234622021 its reverse (1202264321), we get a palindrome (2436886342).

The spelling of 1234622021 in words is "one billion, two hundred thirty-four million, six hundred twenty-two thousand, twenty-one".