1212743434 has 24 divisors (see below), whose sum is σ = 2118831588. Its totient is φ = 519079680.

The previous prime is 1212743423. The next prime is 1212743503. The reversal of 1212743434 is 4343472121.

It can be written as a sum of positive squares in 2 ways, for example, as 1193357025 + 19386409 = 34545^2 + 4403^2 .

It is a super-2 number, since 2×1212743434² = 2941493273420224712, which contains 22 as substring.

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 = 1212743396 and 1212743405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72922 + ... + 87994.

Almost surely, 2^1212743434 is an apocalyptic number.

1212743434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1212743434 is a deficient number, since it is larger than the sum of its proper divisors (906088154).

1212743434 is a wasteful number, since it uses less digits than its factorization.

1212743434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15910 (or 15903 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 1212743434 is about 34824.4660260570. The cubic root of 1212743434 is about 1066.4069758216.

The spelling of 1212743434 in words is "one billion, two hundred twelve million, seven hundred forty-three thousand, four hundred thirty-four".