1204342155 has 16 divisors (see below), whose sum is σ = 2141052960. Its totient is φ = 642315744.

The previous prime is 1204342129. The next prime is 1204342171. The reversal of 1204342155 is 5512434021.

1204342155 is a `hidden beast` number, since 12 + 0 + 434 + 215 + 5 = 666.

It is not a de Polignac number, because 1204342155 - 2⁶ = 1204342091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 4460392 + ... + 4460661.

It is an arithmetic number, because the mean of its divisors is an integer number (133815810).

Almost surely, 2^1204342155 is an apocalyptic number.

1204342155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1204342155 is a deficient number, since it is larger than the sum of its proper divisors (936710805).

1204342155 is an equidigital number, since it uses as much as digits as its factorization.

1204342155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921067 (or 8921061 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1204342155 is about 34703.6331671484. The cubic root of 1204342155 is about 1063.9387563798.

Adding to 1204342155 its reverse (5512434021), we get a palindrome (6716776176).

The spelling of 1204342155 in words is "one billion, two hundred four million, three hundred forty-two thousand, one hundred fifty-five".