121737481 has 2 divisors, whose sum is σ = 121737482. Its totient is φ = 121737480.

The previous prime is 121737457. The next prime is 121737491. The reversal of 121737481 is 184737121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102333456 + 19404025 = 10116^2 + 4405^2 .

It is a cyclic number.

It is not a de Polignac number, because 121737481 - 2¹¹ = 121735433 is a prime.

It is a super-2 number, since 2×121737481² = 29640028560450722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121737491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60868740 + 60868741.

It is an arithmetic number, because the mean of its divisors is an integer number (60868741).

Almost surely, 2^121737481 is an apocalyptic number.

It is an amenable number.

121737481 is a deficient number, since it is larger than the sum of its proper divisors (1).

121737481 is an equidigital number, since it uses as much as digits as its factorization.

121737481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 34.

The square root of 121737481 is about 11033.4709407330. The cubic root of 121737481 is about 495.6115707287.

The spelling of 121737481 in words is "one hundred twenty-one million, seven hundred thirty-seven thousand, four hundred eighty-one".