1252125281 has 16 divisors (see below), whose sum is σ = 1401236928. Its totient is φ = 1108972800.

The previous prime is 1252125271. The next prime is 1252125311. The reversal of 1252125281 is 1825212521.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252125281 is a prime.

It is a super-2 number, since 2×1252125281² = 3135635438638657922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252125211) 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, 421106 + ... + 424068.

It is an arithmetic number, because the mean of its divisors is an integer number (87577308).

Almost surely, 2^1252125281 is an apocalyptic number.

1252125281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1252125281 is a deficient number, since it is larger than the sum of its proper divisors (149111647).

1252125281 is a wasteful number, since it uses less digits than its factorization.

1252125281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952.

The product of its digits is 3200, while the sum is 29.

The square root of 1252125281 is about 35385.3823068227. The cubic root of 1252125281 is about 1077.8275032261.

The spelling of 1252125281 in words is "one billion, two hundred fifty-two million, one hundred twenty-five thousand, two hundred eighty-one".