1021226452 has 6 divisors (see below), whose sum is σ = 1787146298. Its totient is φ = 510613224.

The previous prime is 1021226449. The next prime is 1021226461. The reversal of 1021226452 is 2546221201.

It can be written as a sum of positive squares in only one way, i.e., 733109776 + 288116676 = 27076^2 + 16974^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127653303 + ... + 127653310.

Almost surely, 2^1021226452 is an apocalyptic number.

It is an amenable number.

1021226452 is a deficient number, since it is larger than the sum of its proper divisors (765919846).

1021226452 is a wasteful number, since it uses less digits than its factorization.

1021226452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255306617 (or 255306615 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1021226452 is about 31956.6339278717. The cubic root of 1021226452 is about 1007.0260036603.

Adding to 1021226452 its reverse (2546221201), we get a palindrome (3567447653).

The spelling of 1021226452 in words is "one billion, twenty-one million, two hundred twenty-six thousand, four hundred fifty-two".