1421213252 has 6 divisors (see below), whose sum is σ = 2487123198. Its totient is φ = 710606624.

The previous prime is 1421213231. The next prime is 1421213273. The reversal of 1421213252 is 2523121241.

It is an interprime number because it is at equal distance from previous prime (1421213231) and next prime (1421213273).

It can be written as a sum of positive squares in only one way, i.e., 1068374596 + 352838656 = 32686^2 + 18784^2 .

It is a super-3 number, since 3×1421213252³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 177651653 + ... + 177651660.

It is an arithmetic number, because the mean of its divisors is an integer number (414520533).

Almost surely, 2^1421213252 is an apocalyptic number.

It is an amenable number.

1421213252 is a deficient number, since it is larger than the sum of its proper divisors (1065909946).

1421213252 is a wasteful number, since it uses less digits than its factorization.

1421213252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355303317 (or 355303315 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1421213252 is about 37698.9821082745. The cubic root of 1421213252 is about 1124.3108871424.

Adding to 1421213252 its reverse (2523121241), we get a palindrome (3944334493).

The spelling of 1421213252 in words is "one billion, four hundred twenty-one million, two hundred thirteen thousand, two hundred fifty-two".