1251132141 has 24 divisors (see below), whose sum is σ = 1942251744. Its totient is φ = 714299040.

The previous prime is 1251132139. The next prime is 1251132161. The reversal of 1251132141 is 1412311521.

It is not a de Polignac number, because 1251132141 - 2¹ = 1251132139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251132161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199926 + ... + 206088.

It is an arithmetic number, because the mean of its divisors is an integer number (80927156).

Almost surely, 2^1251132141 is an apocalyptic number.

It is an amenable number.

1251132141 is a deficient number, since it is larger than the sum of its proper divisors (691119603).

1251132141 is a wasteful number, since it uses less digits than its factorization.

1251132141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561 (or 7554 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1251132141 is about 35371.3463272180. The cubic root of 1251132141 is about 1077.5424633937.

Adding to 1251132141 its reverse (1412311521), we get a palindrome (2663443662).

The spelling of 1251132141 in words is "one billion, two hundred fifty-one million, one hundred thirty-two thousand, one hundred forty-one".