1221452355 has 8 divisors (see below), whose sum is σ = 1954323792. Its totient is φ = 651441248.

The previous prime is 1221452341. The next prime is 1221452371. The reversal of 1221452355 is 5532541221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221452355 - 2⁴ = 1221452339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40715064 + ... + 40715093.

It is an arithmetic number, because the mean of its divisors is an integer number (244290474).

Almost surely, 2^1221452355 is an apocalyptic number.

1221452355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1221452355 is a deficient number, since it is larger than the sum of its proper divisors (732871437).

1221452355 is an equidigital number, since it uses as much as digits as its factorization.

1221452355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81430165.

The product of its digits is 12000, while the sum is 30.

The square root of 1221452355 is about 34949.2826106631. The cubic root of 1221452355 is about 1068.9535741617.

Adding to 1221452355 its reverse (5532541221), we get a palindrome (6753993576).

The spelling of 1221452355 in words is "one billion, two hundred twenty-one million, four hundred fifty-two thousand, three hundred fifty-five".