121251545 has 8 divisors (see below), whose sum is σ = 148247496. Its totient is φ = 95170816.

The previous prime is 121251541. The next prime is 121251583. The reversal of 121251545 is 545152121.

It can be written as a sum of positive squares in 4 ways, for example, as 53699584 + 67551961 = 7328^2 + 8219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121251545 - 2² = 121251541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121251541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228512 + ... + 229041.

It is an arithmetic number, because the mean of its divisors is an integer number (18530937).

Almost surely, 2^121251545 is an apocalyptic number.

It is an amenable number.

121251545 is a deficient number, since it is larger than the sum of its proper divisors (26995951).

121251545 is an equidigital number, since it uses as much as digits as its factorization.

121251545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457611.

The product of its digits is 2000, while the sum is 26.

The square root of 121251545 is about 11011.4279273853. The cubic root of 121251545 is about 494.9512518739.

The spelling of 121251545 in words is "one hundred twenty-one million, two hundred fifty-one thousand, five hundred forty-five".