1252131555 has 16 divisors (see below), whose sum is σ = 2004528384. Its totient is φ = 667430880.

The previous prime is 1252131539. The next prime is 1252131557. The reversal of 1252131555 is 5551312521.

It is not a de Polignac number, because 1252131555 - 2⁴ = 1252131539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252131557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5650 + ... + 50360.

It is an arithmetic number, because the mean of its divisors is an integer number (125283024).

Almost surely, 2^1252131555 is an apocalyptic number.

1252131555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252131555 is a deficient number, since it is larger than the sum of its proper divisors (752396829).

1252131555 is a wasteful number, since it uses less digits than its factorization.

1252131555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46586.

The product of its digits is 7500, while the sum is 30.

The square root of 1252131555 is about 35385.4709591380. The cubic root of 1252131555 is about 1077.8293034396.

The spelling of 1252131555 in words is "one billion, two hundred fifty-two million, one hundred thirty-one thousand, five hundred fifty-five".