1540425 has 48 divisors (see below), whose sum is σ = 2856960. Its totient is φ = 728640.

The previous prime is 1540423. The next prime is 1540447. The reversal of 1540425 is 5240451.

It is not a de Polignac number, because 1540425 - 2¹ = 1540423 is a prime.

1540425 is a lucky 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 47 ways as a sum of consecutive naturals, for example, 32752 + ... + 32798.

It is an arithmetic number, because the mean of its divisors is an integer number (59520).

2^1540425 is an apocalyptic number.

1540425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540425 is a deficient number, since it is larger than the sum of its proper divisors (1316535).

1540425 is a wasteful number, since it uses less digits than its factorization.

1540425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1540425 is about 1241.1385901663. The cubic root of 1540425 is about 115.4906572155.

Adding to 1540425 its reverse (5240451), we get a palindrome (6780876).

The spelling of 1540425 in words is "one million, five hundred forty thousand, four hundred twenty-five".