1251132541 has 16 divisors (see below), whose sum is σ = 1355961600. Its totient is φ = 1151238528.

The previous prime is 1251132521. The next prime is 1251132557. The reversal of 1251132541 is 1452311521.

It is a cyclic number.

It is not a de Polignac number, because 1251132541 - 2¹¹ = 1251130493 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 (1251132511) 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, 67480 + ... + 83998.

It is an arithmetic number, because the mean of its divisors is an integer number (84747600).

Almost surely, 2^1251132541 is an apocalyptic number.

It is an amenable number.

1251132541 is a deficient number, since it is larger than the sum of its proper divisors (104829059).

1251132541 is a wasteful number, since it uses less digits than its factorization.

1251132541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668.

The product of its digits is 1200, while the sum is 25.

The square root of 1251132541 is about 35371.3519815118. The cubic root of 1251132541 is about 1077.5425782275.

The spelling of 1251132541 in words is "one billion, two hundred fifty-one million, one hundred thirty-two thousand, five hundred forty-one".