1242247046 has 4 divisors (see below), whose sum is σ = 1863370572. Its totient is φ = 621123522.

The previous prime is 1242247021. The next prime is 1242247049. The reversal of 1242247046 is 6407422421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6407422421 = 19 ⋅337232759.

It is a super-2 number, since 2×1242247046² = 3086355446591452232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242247049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310561760 + ... + 310561763.

It is an arithmetic number, because the mean of its divisors is an integer number (465842643).

Almost surely, 2^1242247046 is an apocalyptic number.

1242247046 is a deficient number, since it is larger than the sum of its proper divisors (621123526).

1242247046 is an equidigital number, since it uses as much as digits as its factorization.

1242247046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621123525.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 1242247046 is about 35245.5251911502. The cubic root of 1242247046 is about 1074.9856269216.

Adding to 1242247046 its reverse (6407422421), we get a palindrome (7649669467).

The spelling of 1242247046 in words is "one billion, two hundred forty-two million, two hundred forty-seven thousand, forty-six".