1157478 has 48 divisors (see below), whose sum is σ = 2801664. Its totient is φ = 317520.

The previous prime is 1157449. The next prime is 1157489. The reversal of 1157478 is 8747511.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9051 + ... + 9177.

It is an arithmetic number, because the mean of its divisors is an integer number (58368).

2^1157478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400832).

1157478 is an abundant number, since it is smaller than the sum of its proper divisors (1644186).

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

1157478 is a wasteful number, since it uses less digits than its factorization.

1157478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 170 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 1157478 is about 1075.8615152518. The cubic root of 1157478 is about 104.9955553674.

Adding to 1157478 its sum of digits (33), we get a palindrome (1157511).

The spelling of 1157478 in words is "one million, one hundred fifty-seven thousand, four hundred seventy-eight".