121895402 has 4 divisors (see below), whose sum is σ = 182843106. Its totient is φ = 60947700.

The previous prime is 121895401. The next prime is 121895413. The reversal of 121895402 is 204598121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109014481 + 12880921 = 10441^2 + 3589^2 .

It is not an unprimeable number, because it can be changed into a prime (121895401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30473849 + ... + 30473852.

Almost surely, 2^121895402 is an apocalyptic number.

121895402 is a deficient number, since it is larger than the sum of its proper divisors (60947704).

121895402 is an equidigital number, since it uses as much as digits as its factorization.

121895402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60947703.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 121895402 is about 11040.6250728842. The cubic root of 121895402 is about 495.8257848312.

The spelling of 121895402 in words is "one hundred twenty-one million, eight hundred ninety-five thousand, four hundred two".