1022252421 has 16 divisors (see below), whose sum is σ = 1436428800. Its totient is φ = 644873328.

The previous prime is 1022252419. The next prime is 1022252461. The reversal of 1022252421 is 1242522201.

It is not a de Polignac number, because 1022252421 - 2¹ = 1022252419 is a prime.

It is a super-2 number, since 2×1022252421² = 2090000024480722482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022252461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40450 + ... + 60668.

It is an arithmetic number, because the mean of its divisors is an integer number (89776800).

Almost surely, 2^1022252421 is an apocalyptic number.

It is an amenable number.

1022252421 is a deficient number, since it is larger than the sum of its proper divisors (414176379).

1022252421 is a wasteful number, since it uses less digits than its factorization.

1022252421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21128.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1022252421 is about 31972.6824179642. The cubic root of 1022252421 is about 1007.3631249916.

Adding to 1022252421 its reverse (1242522201), we get a palindrome (2264774622).

The spelling of 1022252421 in words is "one billion, twenty-two million, two hundred fifty-two thousand, four hundred twenty-one".