1212540 has 48 divisors (see below), whose sum is σ = 3881472. Its totient is φ = 277056.

The previous prime is 1212521. The next prime is 1212551. The reversal of 1212540 is 452121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (80864).

2^1212540 is an apocalyptic number.

1212540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212540 is an abundant number, since it is smaller than the sum of its proper divisors (2668932).

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

1212540 is a wasteful number, since it uses less digits than its factorization.

1212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2904 counting only the distinct ones).

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

The square root of 1212540 is about 1101.1539401918. The cubic root of 1212540 is about 106.6347343651.

Adding to 1212540 its reverse (452121), we get a palindrome (1664661).

The spelling of 1212540 in words is "one million, two hundred twelve thousand, five hundred forty".