1221414465 has 16 divisors (see below), whose sum is σ = 1981035648. Its totient is φ = 642496896.

The previous prime is 1221414461. The next prime is 1221414473. The reversal of 1221414465 is 5644141221.

It is not a de Polignac number, because 1221414465 - 2² = 1221414461 is a prime.

It is a super-2 number, since 2×1221414465² = 2983706590622472450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221414461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556629 + ... + 558818.

It is an arithmetic number, because the mean of its divisors is an integer number (123814728).

Almost surely, 2^1221414465 is an apocalyptic number.

1221414465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221414465 is a deficient number, since it is larger than the sum of its proper divisors (759621183).

1221414465 is a wasteful number, since it uses less digits than its factorization.

1221414465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115528.

The product of its digits is 7680, while the sum is 30.

The square root of 1221414465 is about 34948.7405352468. The cubic root of 1221414465 is about 1068.9425209076.

Adding to 1221414465 its reverse (5644141221), we get a palindrome (6865555686).

The spelling of 1221414465 in words is "one billion, two hundred twenty-one million, four hundred fourteen thousand, four hundred sixty-five".