1212545432 has 32 divisors (see below), whose sum is σ = 2618161920. Its totient is φ = 515692320.

The previous prime is 1212545413. The next prime is 1212545443. The reversal of 1212545432 is 2345452121.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1212545395 and 1212545404.

It is a congruent number.

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, 75308 + ... + 89979.

It is an arithmetic number, because the mean of its divisors is an integer number (81817560).

Almost surely, 2^1212545432 is an apocalyptic number.

It is an amenable number.

1212545432 is an abundant number, since it is smaller than the sum of its proper divisors (1405616488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212545432 is a wasteful number, since it uses less digits than its factorization.

1212545432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165431 (or 165427 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 1212545432 is about 34821.6230523507. The cubic root of 1212545432 is about 1066.3489360085.

Adding to 1212545432 its reverse (2345452121), we get a palindrome (3557997553).

The spelling of 1212545432 in words is "one billion, two hundred twelve million, five hundred forty-five thousand, four hundred thirty-two".