1202142155 has 4 divisors (see below), whose sum is σ = 1442570592. Its totient is φ = 961713720.

The previous prime is 1202142121. The next prime is 1202142163. The reversal of 1202142155 is 5512412021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1202142155 - 2⁶ = 1202142091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202142155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120214211 + ... + 120214220.

It is an arithmetic number, because the mean of its divisors is an integer number (360642648).

Almost surely, 2^1202142155 is an apocalyptic number.

1202142155 is a deficient number, since it is larger than the sum of its proper divisors (240428437).

1202142155 is an equidigital number, since it uses as much as digits as its factorization.

1202142155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240428436.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1202142155 is about 34671.9217090717. The cubic root of 1202142155 is about 1063.2905208952.

Adding to 1202142155 its reverse (5512412021), we get a palindrome (6714554176).

The spelling of 1202142155 in words is "one billion, two hundred two million, one hundred forty-two thousand, one hundred fifty-five".