121256497 has 4 divisors (see below), whose sum is σ = 121328676. Its totient is φ = 121184320.

The previous prime is 121256489. The next prime is 121256503. The reversal of 121256497 is 794652121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34468641 + 86787856 = 5871^2 + 9316^2 .

It is a cyclic number.

It is not a de Polignac number, because 121256497 - 2³ = 121256489 is a prime.

It is a super-2 number, since 2×121256497² = 29406276129422018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121256417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33508 + ... + 36949.

It is an arithmetic number, because the mean of its divisors is an integer number (30332169).

Almost surely, 2^121256497 is an apocalyptic number.

It is an amenable number.

121256497 is a deficient number, since it is larger than the sum of its proper divisors (72179).

121256497 is an equidigital number, since it uses as much as digits as its factorization.

121256497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72178.

The product of its digits is 30240, while the sum is 37.

The square root of 121256497 is about 11011.6527823937. The cubic root of 121256497 is about 494.9579898368.

The spelling of 121256497 in words is "one hundred twenty-one million, two hundred fifty-six thousand, four hundred ninety-seven".