1540147 has 4 divisors (see below), whose sum is σ = 1760176. Its totient is φ = 1320120.

The previous prime is 1540141. The next prime is 1540151. The reversal of 1540147 is 7410451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1540147 - 2¹⁵ = 1507379 is a prime.

It is a Duffinian number.

1540147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1540141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110004 + ... + 110017.

It is an arithmetic number, because the mean of its divisors is an integer number (440044).

2^1540147 is an apocalyptic number.

1540147 is a deficient number, since it is larger than the sum of its proper divisors (220029).

1540147 is an equidigital number, since it uses as much as digits as its factorization.

1540147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220028.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1540147 is about 1241.0265911736. The cubic root of 1540147 is about 115.4837092770.

Adding to 1540147 its reverse (7410451), we get a palindrome (8950598).

The spelling of 1540147 in words is "one million, five hundred forty thousand, one hundred forty-seven".