1252641487 has 4 divisors (see below), whose sum is σ = 1254932056. Its totient is φ = 1250350920.

The previous prime is 1252641473. The next prime is 1252641493. The reversal of 1252641487 is 7841462521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7841462521 = 3581 ⋅2189741.

It is a cyclic number.

It is not a de Polignac number, because 1252641487 - 2¹⁵ = 1252608719 is a prime.

It is a super-2 number, since 2×1252641487² = 3138221389907142338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252641497) 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 3 ways as a sum of consecutive naturals, for example, 1144464 + ... + 1145557.

It is an arithmetic number, because the mean of its divisors is an integer number (313733014).

Almost surely, 2^1252641487 is an apocalyptic number.

1252641487 is a deficient number, since it is larger than the sum of its proper divisors (2290569).

1252641487 is an equidigital number, since it uses as much as digits as its factorization.

1252641487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290568.

The product of its digits is 107520, while the sum is 40.

The square root of 1252641487 is about 35392.6756123354. The cubic root of 1252641487 is about 1077.9755993183.

The spelling of 1252641487 in words is "one billion, two hundred fifty-two million, six hundred forty-one thousand, four hundred eighty-seven".