1540436 has 6 divisors (see below), whose sum is σ = 2695770. Its totient is φ = 770216.

The previous prime is 1540423. The next prime is 1540447. The reversal of 1540436 is 6340451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 828100 + 712336 = 910^2 + 844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192551 + ... + 192558.

It is an arithmetic number, because the mean of its divisors is an integer number (449295).

2^1540436 is an apocalyptic number.

It is an amenable number.

1540436 is a deficient number, since it is larger than the sum of its proper divisors (1155334).

1540436 is a wasteful number, since it uses less digits than its factorization.

1540436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385113 (or 385111 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1540436 is about 1241.1430215733. The cubic root of 1540436 is about 115.4909321167.

Adding to 1540436 its reverse (6340451), we get a palindrome (7880887).

The spelling of 1540436 in words is "one million, five hundred forty thousand, four hundred thirty-six".