1253005155 has 48 divisors (see below), whose sum is σ = 2270601216. Its totient is φ = 638003520.

The previous prime is 1253005147. The next prime is 1253005157. The reversal of 1253005155 is 5515003521.

It is not a de Polignac number, because 1253005155 - 2³ = 1253005147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253005157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 851070 + ... + 852540.

It is an arithmetic number, because the mean of its divisors is an integer number (47304192).

Almost surely, 2^1253005155 is an apocalyptic number.

1253005155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1253005155 is a deficient number, since it is larger than the sum of its proper divisors (1017596061).

1253005155 is a wasteful number, since it uses less digits than its factorization.

1253005155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 1253005155 is about 35397.8128561639. The cubic root of 1253005155 is about 1078.0799088388.

Adding to 1253005155 its reverse (5515003521), we get a palindrome (6768008676).

The spelling of 1253005155 in words is "one billion, two hundred fifty-three million, five thousand, one hundred fifty-five".