121631395 has 16 divisors (see below), whose sum is σ = 150780960. Its totient is φ = 94120704.

The previous prime is 121631357. The next prime is 121631399. The reversal of 121631395 is 593136121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121631395 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (121631399) 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, 31279 + ... + 34951.

It is an arithmetic number, because the mean of its divisors is an integer number (9423810).

Almost surely, 2^121631395 is an apocalyptic number.

121631395 is a deficient number, since it is larger than the sum of its proper divisors (29149565).

121631395 is a wasteful number, since it uses less digits than its factorization.

121631395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894.

The product of its digits is 4860, while the sum is 31.

The square root of 121631395 is about 11028.6624302315. The cubic root of 121631395 is about 495.4675648766.

The spelling of 121631395 in words is "one hundred twenty-one million, six hundred thirty-one thousand, three hundred ninety-five".