121442437 has 2 divisors, whose sum is σ = 121442438. Its totient is φ = 121442436.

The previous prime is 121442389. The next prime is 121442443. The reversal of 121442437 is 734244121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119443041 + 1999396 = 10929^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 121442437 - 2⁷ = 121442309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121442837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60721218 + 60721219.

It is an arithmetic number, because the mean of its divisors is an integer number (60721219).

Almost surely, 2^121442437 is an apocalyptic number.

It is an amenable number.

121442437 is a deficient number, since it is larger than the sum of its proper divisors (1).

121442437 is an equidigital number, since it uses as much as digits as its factorization.

121442437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 121442437 is about 11020.0924224799. The cubic root of 121442437 is about 495.2108573497.

Adding to 121442437 its reverse (734244121), we get a palindrome (855686558).

It can be divided in two parts, 1214424 and 37, that added together give a triangular number (1214461 = T₁₅₅₈).

The spelling of 121442437 in words is "one hundred twenty-one million, four hundred forty-two thousand, four hundred thirty-seven".