1243867152 has 80 divisors (see below), whose sum is σ = 3711673152. Its totient is φ = 354754560.

The previous prime is 1243867151. The next prime is 1243867153. The reversal of 1243867152 is 2517683421.

It is an interprime number because it is at equal distance from previous prime (1243867151) and next prime (1243867153).

It is a super-2 number, since 2×1243867152² = 3094410983649182208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1243867152.

It is not an unprimeable number, because it can be changed into a prime (1243867151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60313 + ... + 78264.

Almost surely, 2^1243867152 is an apocalyptic number.

1243867152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1243867152 is an abundant number, since it is smaller than the sum of its proper divisors (2467806000).

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

1243867152 is a wasteful number, since it uses less digits than its factorization.

1243867152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138616 (or 138610 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 1243867152 is about 35268.5008470732. The cubic root of 1243867152 is about 1075.4527465941.

The spelling of 1243867152 in words is "one billion, two hundred forty-three million, eight hundred sixty-seven thousand, one hundred fifty-two".