1071540 has 36 divisors (see below), whose sum is σ = 3250884. Its totient is φ = 285696.

The previous prime is 1071533. The next prime is 1071541. The reversal of 1071540 is 451701.

It can be written as a sum of positive squares in 2 ways, for example, as 138384 + 933156 = 372^2 + 966^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1071540² = 2296395943200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2797 + ... + 3156.

2^1071540 is an apocalyptic number.

1071540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1071540 is an abundant number, since it is smaller than the sum of its proper divisors (2179344).

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

1071540 is a wasteful number, since it uses less digits than its factorization.

1071540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1071540 is about 1035.1521627278. The cubic root of 1071540 is about 102.3299580020.

The spelling of 1071540 in words is "one million, seventy-one thousand, five hundred forty".