1141309961 has 4 divisors (see below), whose sum is σ = 1245065424. Its totient is φ = 1037554500.

The previous prime is 1141309927. The next prime is 1141309963. The reversal of 1141309961 is 1699031411.

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.

It is a cyclic number.

It is not a de Polignac number, because 1141309961 - 2²⁶ = 1074201097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1141309963) 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, 51877715 + ... + 51877736.

It is an arithmetic number, because the mean of its divisors is an integer number (311266356).

Almost surely, 2^1141309961 is an apocalyptic number.

1141309961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1141309961 is a deficient number, since it is larger than the sum of its proper divisors (103755463).

1141309961 is a wasteful number, since it uses less digits than its factorization.

1141309961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103755462.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1141309961 is about 33783.2793109254. The cubic root of 1141309961 is about 1045.0439031332.

The spelling of 1141309961 in words is "one billion, one hundred forty-one million, three hundred nine thousand, nine hundred sixty-one".