1129261541 has 4 divisors (see below), whose sum is σ = 1130654784. Its totient is φ = 1127868300.

The previous prime is 1129261501. The next prime is 1129261559. The reversal of 1129261541 is 1451629211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1451629211 = 5099 ⋅284689.

It is a cyclic number.

It is not a de Polignac number, because 1129261541 - 2⁶ = 1129261477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129261498 and 1129261507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129261501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695405 + ... + 697026.

It is an arithmetic number, because the mean of its divisors is an integer number (282663696).

Almost surely, 2^1129261541 is an apocalyptic number.

It is an amenable number.

1129261541 is a deficient number, since it is larger than the sum of its proper divisors (1393243).

1129261541 is an equidigital number, since it uses as much as digits as its factorization.

1129261541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393242.

The product of its digits is 4320, while the sum is 32.

The square root of 1129261541 is about 33604.4869176722. The cubic root of 1129261541 is about 1041.3534956961.

The spelling of 1129261541 in words is "one billion, one hundred twenty-nine million, two hundred sixty-one thousand, five hundred forty-one".