1157481 has 18 divisors (see below), whose sum is σ = 1812798. Its totient is φ = 711360.

The previous prime is 1157449. The next prime is 1157489. The reversal of 1157481 is 1847511.

1157481 is a `hidden beast` number, since 11 + 574 + 81 = 666.

1157481 is a nontrivial binomial coefficient, being equal to C(1522, 2).

It can be written as a sum of positive squares in 3 ways, for example, as 147456 + 1010025 = 384^2 + 1005^2 .

It is not a de Polignac number, because 1157481 - 2⁵ = 1157449 is a prime.

It is a super-2 number, since 2×1157481² = 2679524530722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157489) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1141 + ... + 1901.

It is an arithmetic number, because the mean of its divisors is an integer number (100711).

2^1157481 is an apocalyptic number.

1157481 is the 1521-st triangular number and also the 761-st hexagonal number.

It is an amenable number.

1157481 is a deficient number, since it is larger than the sum of its proper divisors (655317).

1157481 is a wasteful number, since it uses less digits than its factorization.

1157481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 777 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 1157481 is about 1075.8629094824. The cubic root of 1157481 is about 104.9956460780.

The spelling of 1157481 in words is "one million, one hundred fifty-seven thousand, four hundred eighty-one".