1540245 has 16 divisors (see below), whose sum is σ = 2816640. Its totient is φ = 704064.

The previous prime is 1540243. The next prime is 1540249. The reversal of 1540245 is 5420451.

1540245 = T₂₇₉ + T₂₈₀ + ... + T₃₁₃.

It is not a de Polignac number, because 1540245 - 2¹ = 1540243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7230 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (176040).

2^1540245 is an apocalyptic number.

1540245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1540245 is a deficient number, since it is larger than the sum of its proper divisors (1276395).

1540245 is a wasteful number, since it uses less digits than its factorization.

1540245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14684.

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

The square root of 1540245 is about 1241.0660739864. The cubic root of 1540245 is about 115.4861586457.

Adding to 1540245 its reverse (5420451), we get a palindrome (6960696).

The spelling of 1540245 in words is "one million, five hundred forty thousand, two hundred forty-five".