121243452 has 48 divisors (see below), whose sum is σ = 311211264. Its totient is φ = 36735600.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243452 is 254342121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243457) 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, 12177 + ... + 19767.

It is an arithmetic number, because the mean of its divisors is an integer number (6483568).

Almost surely, 2^121243452 is an apocalyptic number.

121243452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121243452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155605632).

121243452 is an abundant number, since it is smaller than the sum of its proper divisors (189967812).

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

121243452 is a wasteful number, since it uses less digits than its factorization.

121243452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631 (or 7607 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 121243452 is about 11011.0604393946. The cubic root of 121243452 is about 494.9402396991.

Adding to 121243452 its reverse (254342121), we get a palindrome (375585573).

It can be divided in two parts, 12124 and 3452, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 121243452 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred fifty-two".