1242358273 has 8 divisors (see below), whose sum is σ = 1349765928. Its totient is φ = 1136642304.

The previous prime is 1242358267. The next prime is 1242358291. The reversal of 1242358273 is 3728532421.

It can be written as a sum of positive squares in 4 ways, for example, as 62916624 + 1179441649 = 7932^2 + 34343^2 .

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 1242358273 - 2⁹ = 1242357761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242358253) 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, 421390 + ... + 424327.

It is an arithmetic number, because the mean of its divisors is an integer number (168720741).

Almost surely, 2^1242358273 is an apocalyptic number.

1242358273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1242358273 is a deficient number, since it is larger than the sum of its proper divisors (107407655).

1242358273 is a wasteful number, since it uses less digits than its factorization.

1242358273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845843.

The product of its digits is 80640, while the sum is 37.

The square root of 1242358273 is about 35247.1030440801. The cubic root of 1242358273 is about 1075.0177096055.

The spelling of 1242358273 in words is "one billion, two hundred forty-two million, three hundred fifty-eight thousand, two hundred seventy-three".