1212540736 has 28 divisors (see below), whose sum is σ = 2624876640. Its totient is φ = 551154560.

The previous prime is 1212540709. The next prime is 1212540751. The reversal of 1212540736 is 6370452121.

It is a junction number, because it is equal to n+sod(n) for n = 1212540698 and 1212540707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860476 + ... + 861883.

Almost surely, 2^1212540736 is an apocalyptic number.

1212540736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1212540736 is an abundant number, since it is smaller than the sum of its proper divisors (1412335904).

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

1212540736 is a wasteful number, since it uses less digits than its factorization.

1212540736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722382 (or 1722372 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1212540736 is about 34821.5556229184. Note that the first 3 decimals coincide. The cubic root of 1212540736 is about 1066.3475594055.

Adding to 1212540736 its reverse (6370452121), we get a palindrome (7582992857).

The spelling of 1212540736 in words is "one billion, two hundred twelve million, five hundred forty thousand, seven hundred thirty-six".