1540212 has 12 divisors (see below), whose sum is σ = 3593856. Its totient is φ = 513400.

The previous prime is 1540211. The next prime is 1540223. The reversal of 1540212 is 2120451.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1540191 and 1540200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540211) 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, 64164 + ... + 64187.

It is an arithmetic number, because the mean of its divisors is an integer number (299488).

2^1540212 is an apocalyptic number.

1540212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1540212 is an abundant number, since it is smaller than the sum of its proper divisors (2053644).

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

1540212 is a wasteful number, since it uses less digits than its factorization.

1540212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128358 (or 128356 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1540212 is about 1241.0527788938. The cubic root of 1540212 is about 115.4853338699.

Adding to 1540212 its reverse (2120451), we get a palindrome (3660663).

The spelling of 1540212 in words is "one million, five hundred forty thousand, two hundred twelve".