1421057 has 4 divisors (see below), whose sum is σ = 1550256. Its totient is φ = 1291860.

The previous prime is 1421041. The next prime is 1421083. The reversal of 1421057 is 7501241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7501241 = 11 ⋅681931.

It is a cyclic number.

It is not a de Polignac number, because 1421057 - 2⁴ = 1421041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421027) 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, 64583 + ... + 64604.

It is an arithmetic number, because the mean of its divisors is an integer number (387564).

2^1421057 is an apocalyptic number.

It is an amenable number.

1421057 is a deficient number, since it is larger than the sum of its proper divisors (129199).

1421057 is a wasteful number, since it uses less digits than its factorization.

1421057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129198.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1421057 is about 1192.0809536269. The cubic root of 1421057 is about 112.4269682380.

Adding to 1421057 its reverse (7501241), we get a palindrome (8922298).

The spelling of 1421057 in words is "one million, four hundred twenty-one thousand, fifty-seven".