742121247 has 64 divisors (see below), whose sum is σ = 1294894080. Its totient is φ = 367773696.

The previous prime is 742121221. The next prime is 742121273.

742121247 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (742121221) and next prime (742121273).

It is not a de Polignac number, because 742121247 - 2¹⁹ = 741596959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742121747) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 249493 + ... + 252449.

It is an arithmetic number, because the mean of its divisors is an integer number (20232720).

Almost surely, 2^742121247 is an apocalyptic number.

742121247 is a deficient number, since it is larger than the sum of its proper divisors (552772833).

742121247 is a wasteful number, since it uses less digits than its factorization.

742121247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040.

The product of its digits is 6272, while the sum is 30.

The square root of 742121247 is about 27241.9024115424. The cubic root of 742121247 is about 905.3676139496.

The spelling of 742121247 in words is "seven hundred forty-two million, one hundred twenty-one thousand, two hundred forty-seven".