1225304155 has 32 divisors (see below), whose sum is σ = 1588543488. Its totient is φ = 903974400.

The previous prime is 1225304149. The next prime is 1225304239. The reversal of 1225304155 is 5514035221.

It is not a de Polignac number, because 1225304155 - 2¹⁹ = 1224779867 is a prime.

It is a Duffinian number.

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, 1152154 + ... + 1153216.

It is an arithmetic number, because the mean of its divisors is an integer number (49641984).

Almost surely, 2^1225304155 is an apocalyptic number.

1225304155 is a deficient number, since it is larger than the sum of its proper divisors (363239333).

1225304155 is a wasteful number, since it uses less digits than its factorization.

1225304155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1225304155 is about 35004.3448017528. The cubic root of 1225304155 is about 1070.0760288947.

Adding to 1225304155 its reverse (5514035221), we get a palindrome (6739339376).

The spelling of 1225304155 in words is "one billion, two hundred twenty-five million, three hundred four thousand, one hundred fifty-five".