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1457 = 3147
BaseRepresentation
bin10110110001
31222222
4112301
521312
610425
74151
oct2661
91888
101457
111105
12a15
13881
14761
15672
hex5b1

1457 has 4 divisors (see below), whose sum is σ = 1536. Its totient is φ = 1380.

The previous prime is 1453. The next prime is 1459. The reversal of 1457 is 7541.

Adding to 1457 its reverse (7541), we get a palindrome (8998).

Subtracting 1457 from its reverse (7541), we obtain a square (6084 = 782).

It is a happy number.

1457 is nontrivially palindromic in base 5.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1457 - 22 = 1453 is a prime.

It is a Duffinian number.

It is a plaindrome in base 3, base 9 and base 10.

It is a nialpdrome in base 13 and base 14.

It is not an unprimeable number, because it can be changed into a prime (1451) 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, 8 + ... + 54.

It is an arithmetic number, because the mean of its divisors is an integer number (384).

It is an amenable number.

1457 is a deficient number, since it is larger than the sum of its proper divisors (79).

1457 is an equidigital number, since it uses as much as digits as its factorization.

1457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78.

The product of its digits is 140, while the sum is 17.

The square root of 1457 is about 38.1706693680. The cubic root of 1457 is about 11.3366964260.

The spelling of 1457 in words is "one thousand, four hundred fifty-seven".

Divisors: 1 31 47 1457