1242473957 has 4 divisors (see below), whose sum is σ = 1249338636. Its totient is φ = 1235609280.

The previous prime is 1242473933. The next prime is 1242473959. The reversal of 1242473957 is 7593742421.

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 30459361 + 1212014596 = 5519^2 + 34814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242473957 - 2¹² = 1242469861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242473959) 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, 3432068 + ... + 3432429.

It is an arithmetic number, because the mean of its divisors is an integer number (312334659).

Almost surely, 2^1242473957 is an apocalyptic number.

It is an amenable number.

1242473957 is a deficient number, since it is larger than the sum of its proper divisors (6864679).

1242473957 is an equidigital number, since it uses as much as digits as its factorization.

1242473957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864678.

The product of its digits is 423360, while the sum is 44.

The square root of 1242473957 is about 35248.7440485473. The cubic root of 1242473957 is about 1075.0510758498.

The spelling of 1242473957 in words is "one billion, two hundred forty-two million, four hundred seventy-three thousand, nine hundred fifty-seven".