1283457421 has 8 divisors (see below), whose sum is σ = 1315163520. Its totient is φ = 1251835872.

The previous prime is 1283457419. The next prime is 1283457479. The reversal of 1283457421 is 1247543821.

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 1283457421 - 2¹ = 1283457419 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 (1283457491) 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, 10161 + ... + 51673.

It is an arithmetic number, because the mean of its divisors is an integer number (164395440).

Almost surely, 2^1283457421 is an apocalyptic number.

It is an amenable number.

1283457421 is a deficient number, since it is larger than the sum of its proper divisors (31706099).

1283457421 is an equidigital number, since it uses as much as digits as its factorization.

1283457421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42275.

The product of its digits is 53760, while the sum is 37.

The square root of 1283457421 is about 35825.3739826956. The cubic root of 1283457421 is about 1086.7437598941.

The spelling of 1283457421 in words is "one billion, two hundred eighty-three million, four hundred fifty-seven thousand, four hundred twenty-one".