1540427 has 8 divisors (see below), whose sum is σ = 1768416. Its totient is φ = 1314432.

The previous prime is 1540423. The next prime is 1540447. The reversal of 1540427 is 7240451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1540427 - 2² = 1540423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2033 + ... + 2685.

It is an arithmetic number, because the mean of its divisors is an integer number (221052).

2^1540427 is an apocalyptic number.

1540427 is a deficient number, since it is larger than the sum of its proper divisors (227989).

1540427 is an equidigital number, since it uses as much as digits as its factorization.

1540427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 1540427 is about 1241.1393958778. The cubic root of 1540427 is about 115.4907071976.

Adding to 1540427 its reverse (7240451), we get a palindrome (8780878).

The spelling of 1540427 in words is "one million, five hundred forty thousand, four hundred twenty-seven".