1400457 has 4 divisors (see below), whose sum is σ = 1867280. Its totient is φ = 933636.

The previous prime is 1400453. The next prime is 1400479. The reversal of 1400457 is 7540041.

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: 7540041 = 3 ⋅2513347.

It is not a de Polignac number, because 1400457 - 2² = 1400453 is a prime.

It is a super-2 number, since 2×1400457² = 3922559617698, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233407 + ... + 233412.

It is an arithmetic number, because the mean of its divisors is an integer number (466820).

2^1400457 is an apocalyptic number.

It is an amenable number.

1400457 is a deficient number, since it is larger than the sum of its proper divisors (466823).

1400457 is an equidigital number, since it uses as much as digits as its factorization.

1400457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466822.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1400457 is about 1183.4090586099. The cubic root of 1400457 is about 111.8810652850.

Adding to 1400457 its reverse (7540041), we get a palindrome (8940498).

The spelling of 1400457 in words is "one million, four hundred thousand, four hundred fifty-seven".