121630542 has 16 divisors (see below), whose sum is σ = 265375872. Its totient is φ = 36857720.

The previous prime is 121630541. The next prime is 121630543. The reversal of 121630542 is 245036121.

It is an interprime number because it is at equal distance from previous prime (121630541) and next prime (121630543).

It is a super-3 number, since 3×121630542³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121630541) 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, 921378 + ... + 921509.

It is an arithmetic number, because the mean of its divisors is an integer number (16585992).

Almost surely, 2^121630542 is an apocalyptic number.

121630542 is an abundant number, since it is smaller than the sum of its proper divisors (143745330).

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

121630542 is a wasteful number, since it uses less digits than its factorization.

121630542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842903.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 121630542 is about 11028.6237582030. The cubic root of 121630542 is about 495.4664066372.

Adding to 121630542 its reverse (245036121), we get a palindrome (366666663).

The spelling of 121630542 in words is "one hundred twenty-one million, six hundred thirty thousand, five hundred forty-two".