1157646 has 32 divisors (see below), whose sum is σ = 2711808. Its totient is φ = 322560.

The previous prime is 1157641. The next prime is 1157669. The reversal of 1157646 is 6467511.

It is a super-2 number, since 2×1157646² = 2680288522632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157641) 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, 1486 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (84744).

2^1157646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355904).

1157646 is an abundant number, since it is smaller than the sum of its proper divisors (1554162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1157646 is a wasteful number, since it uses less digits than its factorization.

1157646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its digits is 5040, while the sum is 30.

The square root of 1157646 is about 1075.9395893822. The cubic root of 1157646 is about 105.0006349168. Note that the first 3 decimals are identical.

The spelling of 1157646 in words is "one million, one hundred fifty-seven thousand, six hundred forty-six".