1405057 has 6 divisors (see below), whose sum is σ = 1430898. Its totient is φ = 1379664.

The previous prime is 1405039. The next prime is 1405087. The reversal of 1405057 is 7505041.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 646416 = 871^2 + 804^2 .

It is not a de Polignac number, because 1405057 - 2¹¹ = 1403009 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4333 + ... + 4645.

It is an arithmetic number, because the mean of its divisors is an integer number (238483).

2^1405057 is an apocalyptic number.

It is an amenable number.

1405057 is a deficient number, since it is larger than the sum of its proper divisors (25841).

1405057 is an frugal number, since it uses more digits than its factorization.

1405057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 1405057 is about 1185.3510028679. The cubic root of 1405057 is about 112.0034278288.

The spelling of 1405057 in words is "one million, four hundred five thousand, fifty-seven".