1156681406 has 4 divisors (see below), whose sum is σ = 1735022112. Its totient is φ = 578340702.

The previous prime is 1156681403. The next prime is 1156681429. The reversal of 1156681406 is 6041866511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6041866511 = 151 ⋅40012361.

It is a super-2 number, since 2×1156681406² = 2675823749972273672, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156681406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156681403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289170350 + ... + 289170353.

It is an arithmetic number, because the mean of its divisors is an integer number (433755528).

Almost surely, 2^1156681406 is an apocalyptic number.

1156681406 is a deficient number, since it is larger than the sum of its proper divisors (578340706).

1156681406 is an equidigital number, since it uses as much as digits as its factorization.

1156681406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578340705.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1156681406 is about 34010.0192002298. The cubic root of 1156681406 is about 1049.7146332594.

The spelling of 1156681406 in words is "one billion, one hundred fifty-six million, six hundred eighty-one thousand, four hundred six".