123521340 has 48 divisors (see below), whose sum is σ = 351540000. Its totient is φ = 32398080.

The previous prime is 123521309. The next prime is 123521357. The reversal of 123521340 is 43125321.

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, 13215 + ... + 20534.

It is an arithmetic number, because the mean of its divisors is an integer number (7323750).

Almost surely, 2^123521340 is an apocalyptic number.

123521340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123521340 is an abundant number, since it is smaller than the sum of its proper divisors (228018660).

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

123521340 is a wasteful number, since it uses less digits than its factorization.

123521340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33822 (or 33820 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123521340 is about 11114.0154759655. The cubic root of 123521340 is about 498.0206278451.

Adding to 123521340 its reverse (43125321), we get a palindrome (166646661).

The spelling of 123521340 in words is "one hundred twenty-three million, five hundred twenty-one thousand, three hundred forty".