121582493 has 2 divisors, whose sum is σ = 121582494. Its totient is φ = 121582492.

The previous prime is 121582427. The next prime is 121582511. The reversal of 121582493 is 394285121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72624484 + 48958009 = 8522^2 + 6997^2 .

It is an emirp because it is prime and its reverse (394285121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121582493 - 2¹⁸ = 121320349 is a prime.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121582423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60791246 + 60791247.

It is an arithmetic number, because the mean of its divisors is an integer number (60791247).

Almost surely, 2^121582493 is an apocalyptic number.

It is an amenable number.

121582493 is a deficient number, since it is larger than the sum of its proper divisors (1).

121582493 is an equidigital number, since it uses as much as digits as its factorization.

121582493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 121582493 is about 11026.4451660542. The cubic root of 121582493 is about 495.4011549317.

The spelling of 121582493 in words is "one hundred twenty-one million, five hundred eighty-two thousand, four hundred ninety-three".