1540834 has 4 divisors (see below), whose sum is σ = 2311254. Its totient is φ = 770416.

The previous prime is 1540831. The next prime is 1540841. The reversal of 1540834 is 4380451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4380451 = 149 ⋅29399.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 363609 = 1085^2 + 603^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1540799 and 1540808.

It is not an unprimeable number, because it can be changed into a prime (1540831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385207 + ... + 385210.

2^1540834 is an apocalyptic number.

1540834 is a deficient number, since it is larger than the sum of its proper divisors (770420).

1540834 is an equidigital number, since it uses as much as digits as its factorization.

1540834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770419.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1540834 is about 1241.3033472927. The cubic root of 1540834 is about 115.5008776630.

The spelling of 1540834 in words is "one million, five hundred forty thousand, eight hundred thirty-four".