1204155271 has 32 divisors (see below), whose sum is σ = 1461888000. Its totient is φ = 978362880.

The previous prime is 1204155263. The next prime is 1204155307. The reversal of 1204155271 is 1725514021.

It is not a de Polignac number, because 1204155271 - 2³ = 1204155263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204156271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639910 + ... + 641788.

It is an arithmetic number, because the mean of its divisors is an integer number (45684000).

Almost surely, 2^1204155271 is an apocalyptic number.

1204155271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1204155271 is a deficient number, since it is larger than the sum of its proper divisors (257732729).

1204155271 is a wasteful number, since it uses less digits than its factorization.

1204155271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1204155271 is about 34700.9404915775. The cubic root of 1204155271 is about 1063.8837212402.

Adding to 1204155271 its reverse (1725514021), we get a palindrome (2929669292).

The spelling of 1204155271 in words is "one billion, two hundred four million, one hundred fifty-five thousand, two hundred seventy-one".