1540007 has 8 divisors (see below), whose sum is σ = 1852800. Its totient is φ = 1250424.

The previous prime is 1540003. The next prime is 1540009. The reversal of 1540007 is 7000451.

It is a happy number.

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

It is not a de Polignac number, because 1540007 - 2² = 1540003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540003) 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, 5657 + ... + 5922.

It is an arithmetic number, because the mean of its divisors is an integer number (231600).

2^1540007 is an apocalyptic number.

1540007 is a deficient number, since it is larger than the sum of its proper divisors (312793).

1540007 is a wasteful number, since it uses less digits than its factorization.

1540007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11605.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 1540007 is about 1240.9701849763. The cubic root of 1540007 is about 115.4802099986.

Adding to 1540007 its reverse (7000451), we get a palindrome (8540458).

The spelling of 1540007 in words is "one million, five hundred forty thousand, seven".