1202557643 has 4 divisors (see below), whose sum is σ = 1374351600. Its totient is φ = 1030763688.

The previous prime is 1202557637. The next prime is 1202557649. The reversal of 1202557643 is 3467552021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3467552021 = 179 ⋅19371799.

It is an interprime number because it is at equal distance from previous prime (1202557637) and next prime (1202557649).

It is a cyclic number.

It is not a de Polignac number, because 1202557643 - 2⁶ = 1202557579 is a prime.

It is a super-2 number, since 2×1202557643² = 2892289769475430898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202557649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85896968 + ... + 85896981.

It is an arithmetic number, because the mean of its divisors is an integer number (343587900).

Almost surely, 2^1202557643 is an apocalyptic number.

1202557643 is a deficient number, since it is larger than the sum of its proper divisors (171793957).

1202557643 is an equidigital number, since it uses as much as digits as its factorization.

1202557643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171793956.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1202557643 is about 34677.9128985584. The cubic root of 1202557643 is about 1063.4130060114.

The spelling of 1202557643 in words is "one billion, two hundred two million, five hundred fifty-seven thousand, six hundred forty-three".