1200142155 has 32 divisors (see below), whose sum is σ = 1936016640. Its totient is φ = 634838400.

The previous prime is 1200142109. The next prime is 1200142189. The reversal of 1200142155 is 5512410021.

1200142155 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1200142155 - 2⁹ = 1200141643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1141380 + ... + 1142430.

It is an arithmetic number, because the mean of its divisors is an integer number (60500520).

Almost surely, 2^1200142155 is an apocalyptic number.

1200142155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200142155 is a deficient number, since it is larger than the sum of its proper divisors (735874485).

1200142155 is a wasteful number, since it uses less digits than its factorization.

1200142155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1200142155 is about 34643.0679213028. The cubic root of 1200142155 is about 1062.7005292560.

Adding to 1200142155 its reverse (5512410021), we get a palindrome (6712552176).

The spelling of 1200142155 in words is "one billion, two hundred million, one hundred forty-two thousand, one hundred fifty-five".