1201235155 has 16 divisors (see below), whose sum is σ = 1501308864. Its totient is φ = 921836160.

The previous prime is 1201235141. The next prime is 1201235173. The reversal of 1201235155 is 5515321021.

It is not a de Polignac number, because 1201235155 - 2²³ = 1192846547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32592 + ... + 58861.

It is an arithmetic number, because the mean of its divisors is an integer number (93831804).

Almost surely, 2^1201235155 is an apocalyptic number.

1201235155 is a deficient number, since it is larger than the sum of its proper divisors (300073709).

1201235155 is an equidigital number, since it uses as much as digits as its factorization.

1201235155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91566.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1201235155 is about 34658.8394929778. The cubic root of 1201235155 is about 1063.0230408407.

Adding to 1201235155 its reverse (5515321021), we get a palindrome (6716556176).

The spelling of 1201235155 in words is "one billion, two hundred one million, two hundred thirty-five thousand, one hundred fifty-five".