121513642 has 8 divisors (see below), whose sum is σ = 182322756. Its totient is φ = 60739392.

The previous prime is 121513633. The next prime is 121513649. The reversal of 121513642 is 246315121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112338801 + 9174841 = 10599^2 + 3029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121513649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3328 + ... + 15940.

Almost surely, 2^121513642 is an apocalyptic number.

121513642 is a deficient number, since it is larger than the sum of its proper divisors (60809114).

121513642 is a wasteful number, since it uses less digits than its factorization.

121513642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17432.

The product of its digits is 1440, while the sum is 25.

The square root of 121513642 is about 11023.3226388417. The cubic root of 121513642 is about 495.3076236329.

Adding to 121513642 its reverse (246315121), we get a palindrome (367828763).

The spelling of 121513642 in words is "one hundred twenty-one million, five hundred thirteen thousand, six hundred forty-two".