1201024155 has 16 divisors (see below), whose sum is σ = 1923886080. Its totient is φ = 639797088.

The previous prime is 1201024151. The next prime is 1201024157. The reversal of 1201024155 is 5514201021.

It is not a de Polignac number, because 1201024155 - 2² = 1201024151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201024151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33445 + ... + 59334.

It is an arithmetic number, because the mean of its divisors is an integer number (120242880).

Almost surely, 2^1201024155 is an apocalyptic number.

1201024155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201024155 is a deficient number, since it is larger than the sum of its proper divisors (722861925).

1201024155 is an equidigital number, since it uses as much as digits as its factorization.

1201024155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93650.

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

The square root of 1201024155 is about 34655.7954027894. The cubic root of 1201024155 is about 1062.9607962988.

Adding to 1201024155 its reverse (5514201021), we get a palindrome (6715225176).

The spelling of 1201024155 in words is "one billion, two hundred one million, twenty-four thousand, one hundred fifty-five".