121302542 has 4 divisors (see below), whose sum is σ = 181953816. Its totient is φ = 60651270.

The previous prime is 121302541. The next prime is 121302557. The reversal of 121302542 is 245203121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245203121 = 17 ⋅14423713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30325634 + ... + 30325637.

It is an arithmetic number, because the mean of its divisors is an integer number (45488454).

Almost surely, 2^121302542 is an apocalyptic number.

121302542 is a deficient number, since it is larger than the sum of its proper divisors (60651274).

121302542 is an equidigital number, since it uses as much as digits as its factorization.

121302542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60651273.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121302542 is about 11013.7433236843. The cubic root of 121302542 is about 495.0206324087.

Adding to 121302542 its reverse (245203121), we get a palindrome (366505663).

The spelling of 121302542 in words is "one hundred twenty-one million, three hundred two thousand, five hundred forty-two".