1147861 has 16 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 918720.

The previous prime is 1147843. The next prime is 1147889. The reversal of 1147861 is 1687411.

It is not a de Polignac number, because 1147861 - 2¹³ = 1139669 is a prime.

It is a Duffinian number.

1147861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147841) 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, 3115 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^1147861 is an apocalyptic number.

1147861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1147861 is a deficient number, since it is larger than the sum of its proper divisors (263339).

1147861 is a wasteful number, since it uses less digits than its factorization.

1147861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its digits is 1344, while the sum is 28.

The square root of 1147861 is about 1071.3827514012. The cubic root of 1147861 is about 104.7039582500.

The spelling of 1147861 in words is "one million, one hundred forty-seven thousand, eight hundred sixty-one".