1540402 has 8 divisors (see below), whose sum is σ = 2411136. Its totient is φ = 736692.

The previous prime is 1540367. The next prime is 1540403. The reversal of 1540402 is 2040451.

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

It is not an unprimeable number, because it can be changed into a prime (1540403) 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, 16698 + ... + 16789.

It is an arithmetic number, because the mean of its divisors is an integer number (301392).

2^1540402 is an apocalyptic number.

1540402 is a deficient number, since it is larger than the sum of its proper divisors (870734).

1540402 is a wasteful number, since it uses less digits than its factorization.

1540402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33512.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1540402 is about 1241.1293244461. The cubic root of 1540402 is about 115.4900824177.

Adding to 1540402 its reverse (2040451), we get a palindrome (3580853).

The spelling of 1540402 in words is "one million, five hundred forty thousand, four hundred two".