861154541 has 12 divisors (see below), whose sum is σ = 934371648. Its totient is φ = 793310544.

The previous prime is 861154531. The next prime is 861154559. The reversal of 861154541 is 145451168.

It is not a de Polignac number, because 861154541 - 2¹⁸ = 860892397 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 (861154531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83516 + ... + 93258.

It is an arithmetic number, because the mean of its divisors is an integer number (77864304).

Almost surely, 2^861154541 is an apocalyptic number.

It is an amenable number.

861154541 is a deficient number, since it is larger than the sum of its proper divisors (73217107).

861154541 is a wasteful number, since it uses less digits than its factorization.

861154541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292 (or 10279 counting only the distinct ones).

The product of its digits is 19200, while the sum is 35.

The square root of 861154541 is about 29345.4347556822. The cubic root of 861154541 is about 951.3939061182.

The spelling of 861154541 in words is "eight hundred sixty-one million, one hundred fifty-four thousand, five hundred forty-one".