1156431 has 8 divisors (see below), whose sum is σ = 1548720. Its totient is φ = 767552.

The previous prime is 1156429. The next prime is 1156451. The reversal of 1156431 is 1346511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156431 - 2¹ = 1156429 is a prime.

It is a super-2 number, since 2×1156431² = 2674665315522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1156398 and 1156407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (193590).

2^1156431 is an apocalyptic number.

1156431 is a deficient number, since it is larger than the sum of its proper divisors (392289).

1156431 is a wasteful number, since it uses less digits than its factorization.

1156431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705.

The product of its digits is 360, while the sum is 21.

The square root of 1156431 is about 1075.3748183773. The cubic root of 1156431 is about 104.9638878083.

The spelling of 1156431 in words is "one million, one hundred fifty-six thousand, four hundred thirty-one".