1253217655 has 8 divisors (see below), whose sum is σ = 1505298384. Its totient is φ = 1001616000.

The previous prime is 1253217653. The next prime is 1253217661. The reversal of 1253217655 is 5567123521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253217655 - 2¹ = 1253217653 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 (1253217653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113986 + ... + 124495.

It is an arithmetic number, because the mean of its divisors is an integer number (188162298).

Almost surely, 2^1253217655 is an apocalyptic number.

1253217655 is a deficient number, since it is larger than the sum of its proper divisors (252080729).

1253217655 is a wasteful number, since it uses less digits than its factorization.

1253217655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239537.

The product of its digits is 63000, while the sum is 37.

The square root of 1253217655 is about 35400.8143267920. The cubic root of 1253217655 is about 1078.1408500701.

The spelling of 1253217655 in words is "one billion, two hundred fifty-three million, two hundred seventeen thousand, six hundred fifty-five".