121695601 has 8 divisors (see below), whose sum is σ = 123057000. Its totient is φ = 120341760.

The previous prime is 121695577. The next prime is 121695611. The reversal of 121695601 is 106596121.

121695601 = 7800² + 7801².

It can be written as a sum of positive squares in 4 ways, for example, as 40335201 + 81360400 = 6351^2 + 9020^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121695601 - 2¹³ = 121687409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121695611) 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, 34215 + ... + 37603.

It is an arithmetic number, because the mean of its divisors is an integer number (15382125).

Almost surely, 2^121695601 is an apocalyptic number.

121695601 is the 7801-st centered square number.

It is an amenable number.

121695601 is a deficient number, since it is larger than the sum of its proper divisors (1361399).

121695601 is a wasteful number, since it uses less digits than its factorization.

121695601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 121695601 is about 11031.5729159536. The cubic root of 121695601 is about 495.5547309534.

The spelling of 121695601 in words is "one hundred twenty-one million, six hundred ninety-five thousand, six hundred one".