1243430955 has 24 divisors (see below), whose sum is σ = 2321072208. Its totient is φ = 612150336.

The previous prime is 1243430953. The next prime is 1243430963. The reversal of 1243430955 is 5590343421.

It is not a de Polignac number, because 1243430955 - 2¹ = 1243430953 is a prime.

It is a super-2 number, since 2×1243430955² = 3092241079704424050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243430953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1062177 + ... + 1063346.

It is an arithmetic number, because the mean of its divisors is an integer number (96711342).

Almost surely, 2^1243430955 is an apocalyptic number.

1243430955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1243430955 is a deficient number, since it is larger than the sum of its proper divisors (1077641253).

1243430955 is a wasteful number, since it uses less digits than its factorization.

1243430955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125547 (or 2125544 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1243430955 is about 35262.3163589688. The cubic root of 1243430955 is about 1075.3270193123.

The spelling of 1243430955 in words is "one billion, two hundred forty-three million, four hundred thirty thousand, nine hundred fifty-five".