1221410445 has 16 divisors (see below), whose sum is σ = 1965962880. Its totient is φ = 647516864.

The previous prime is 1221410431. The next prime is 1221410513. The reversal of 1221410445 is 5440141221.

It is a cyclic number.

It is not a de Polignac number, because 1221410445 - 2⁷ = 1221410317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241290 + ... + 246299.

It is an arithmetic number, because the mean of its divisors is an integer number (122872680).

Almost surely, 2^1221410445 is an apocalyptic number.

1221410445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221410445 is a deficient number, since it is larger than the sum of its proper divisors (744552435).

1221410445 is a wasteful number, since it uses less digits than its factorization.

1221410445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487764.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1221410445 is about 34948.6830223973. The cubic root of 1221410445 is about 1068.9413481816.

Adding to 1221410445 its reverse (5440141221), we get a palindrome (6661551666).

The spelling of 1221410445 in words is "one billion, two hundred twenty-one million, four hundred ten thousand, four hundred forty-five".