1540002 has 32 divisors (see below), whose sum is σ = 3244032. Its totient is φ = 486864.

The previous prime is 1539997. The next prime is 1540003. The reversal of 1540002 is 2000451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540002.

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 15 ways as a sum of consecutive naturals, for example, 12063 + ... + 12189.

It is an arithmetic number, because the mean of its divisors is an integer number (101376).

2^1540002 is an apocalyptic number.

1540002 is an abundant number, since it is smaller than the sum of its proper divisors (1704030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1540002 is a wasteful number, since it uses less digits than its factorization.

1540002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1540002 is about 1240.9681704218. The cubic root of 1540002 is about 115.4800850205.

Adding to 1540002 its reverse (2000451), we get a palindrome (3540453).

The spelling of 1540002 in words is "one million, five hundred forty thousand, two".