1212025340 has 24 divisors (see below), whose sum is σ = 2545920720. Its totient is φ = 484683008.

The previous prime is 1212025337. The next prime is 1212025343. The reversal of 1212025340 is 435202121.

It is an interprime number because it is at equal distance from previous prime (1212025337) and next prime (1212025343).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212025343) 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, 122291 + ... + 131829.

It is an arithmetic number, because the mean of its divisors is an integer number (106080030).

Almost surely, 2^1212025340 is an apocalyptic number.

1212025340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212025340 is an abundant number, since it is smaller than the sum of its proper divisors (1333895380).

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

1212025340 is a wasteful number, since it uses less digits than its factorization.

1212025340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15901 (or 15899 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1212025340 is about 34814.1543053971. The cubic root of 1212025340 is about 1066.1964526873.

Adding to 1212025340 its reverse (435202121), we get a palindrome (1647227461).

The spelling of 1212025340 in words is "one billion, two hundred twelve million, twenty-five thousand, three hundred forty".