1001222451 has 14 divisors (see below), whose sum is σ = 1501148060. Its totient is φ = 667481148.

The previous prime is 1001222413. The next prime is 1001222459. The reversal of 1001222451 is 1542221001.

It is not a de Polignac number, because 1001222451 - 2⁷ = 1001222323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001222459) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 685981 + ... + 687438.

Almost surely, 2^1001222451 is an apocalyptic number.

1001222451 is a deficient number, since it is larger than the sum of its proper divisors (499925609).

1001222451 is an frugal number, since it uses more digits than its factorization.

1001222451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373437 (or 1373422 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1001222451 is about 31642.0993456503. The cubic root of 1001222451 is about 1000.4073177364.

Adding to 1001222451 its reverse (1542221001), we get a palindrome (2543443452).

The spelling of 1001222451 in words is "one billion, one million, two hundred twenty-two thousand, four hundred fifty-one".