1252302421 has 4 divisors (see below), whose sum is σ = 1256086144. Its totient is φ = 1248518700.

The previous prime is 1252302419. The next prime is 1252302463. The reversal of 1252302421 is 1242032521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242032521 = 5903 ⋅210407.

It is a cyclic number.

It is not a de Polignac number, because 1252302421 - 2¹ = 1252302419 is a prime.

It is a super-2 number, since 2×1252302421² = 3136522707284922482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252302392 and 1252302401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252305421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891365 + ... + 1892026.

It is an arithmetic number, because the mean of its divisors is an integer number (314021536).

Almost surely, 2^1252302421 is an apocalyptic number.

It is an amenable number.

1252302421 is a deficient number, since it is larger than the sum of its proper divisors (3783723).

1252302421 is an equidigital number, since it uses as much as digits as its factorization.

1252302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783722.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1252302421 is about 35387.8852292702. The cubic root of 1252302421 is about 1077.8783281087.

Adding to 1252302421 its reverse (1242032521), we get a palindrome (2494334942).

The spelling of 1252302421 in words is "one billion, two hundred fifty-two million, three hundred two thousand, four hundred twenty-one".