1152421 has 2 divisors, whose sum is σ = 1152422. Its totient is φ = 1152420.

The previous prime is 1152419. The next prime is 1152493. The reversal of 1152421 is 1242511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079521 + 72900 = 1039^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152421 - 2¹ = 1152419 is a prime.

It is a super-2 number, since 2×1152421² = 2656148322482, which contains 22 as substring.

Together with 1152419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1152395 and 1152404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1152121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576210 + 576211.

It is an arithmetic number, because the mean of its divisors is an integer number (576211).

2^1152421 is an apocalyptic number.

It is an amenable number.

1152421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152421 is an equidigital number, since it uses as much as digits as its factorization.

1152421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 16.

The square root of 1152421 is about 1073.5087330805. The cubic root of 1152421 is about 104.8424242608.

Adding to 1152421 its reverse (1242511), we get a palindrome (2394932).

The spelling of 1152421 in words is "one million, one hundred fifty-two thousand, four hundred twenty-one".