1540031 has 2 divisors, whose sum is σ = 1540032. Its totient is φ = 1540030.

The previous prime is 1540027. The next prime is 1540039. The reversal of 1540031 is 1300451.

It is a weak prime.

It is an emirp because it is prime and its reverse (1300451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540031 - 2² = 1540027 is a prime.

It is a super-2 number, since 2×1540031² = 4743390961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1539988 and 1540015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770015 + 770016.

It is an arithmetic number, because the mean of its divisors is an integer number (770016).

2^1540031 is an apocalyptic number.

1540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540031 is an equidigital number, since it uses as much as digits as its factorization.

1540031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1540031 is about 1240.9798547922. The cubic root of 1540031 is about 115.4808098900.

Adding to 1540031 its reverse (1300451), we get a palindrome (2840482).

The spelling of 1540031 in words is "one million, five hundred forty thousand, thirty-one".