1212844465 has 48 divisors (see below), whose sum is σ = 1739926656. Its totient is φ = 794949120.

The previous prime is 1212844427. The next prime is 1212844471. The reversal of 1212844465 is 5644482121.

It is not a de Polignac number, because 1212844465 - 2⁷ = 1212844337 is a prime.

It is a super-2 number, since 2×1212844465² = 2941983392562272450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3598777 + ... + 3599113.

It is an arithmetic number, because the mean of its divisors is an integer number (36248472).

Almost surely, 2^1212844465 is an apocalyptic number.

It is an amenable number.

1212844465 is a deficient number, since it is larger than the sum of its proper divisors (527082191).

1212844465 is a wasteful number, since it uses less digits than its factorization.

1212844465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 487 counting only the distinct ones).

The product of its digits is 61440, while the sum is 37.

The square root of 1212844465 is about 34825.9165708528. The cubic root of 1212844465 is about 1066.4365883426.

The spelling of 1212844465 in words is "one billion, two hundred twelve million, eight hundred forty-four thousand, four hundred sixty-five".