1243457241 has 16 divisors (see below), whose sum is σ = 1789409664. Its totient is φ = 763519104.

The previous prime is 1243457233. The next prime is 1243457249. The reversal of 1243457241 is 1427543421.

It is an interprime number because it is at equal distance from previous prime (1243457233) and next prime (1243457249).

It is not a de Polignac number, because 1243457241 - 2³ = 1243457233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243457249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17061 + ... + 52706.

It is an arithmetic number, because the mean of its divisors is an integer number (111838104).

Almost surely, 2^1243457241 is an apocalyptic number.

It is an amenable number.

1243457241 is a deficient number, since it is larger than the sum of its proper divisors (545952423).

1243457241 is a wasteful number, since it uses less digits than its factorization.

1243457241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70240.

The product of its digits is 26880, while the sum is 33.

The square root of 1243457241 is about 35262.6890778341. The cubic root of 1243457241 is about 1075.3345966924.

The spelling of 1243457241 in words is "one billion, two hundred forty-three million, four hundred fifty-seven thousand, two hundred forty-one".