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121457 = 717351
BaseRepresentation
bin11101101001110001
320011121102
4131221301
512341312
62334145
71014050
oct355161
9204542
10121457
1183286
125a355
134338b
1432397
1525ec2
hex1da71

121457 has 4 divisors (see below), whose sum is σ = 138816. Its totient is φ = 104100.

The previous prime is 121453. The next prime is 121469. The reversal of 121457 is 754121.

Adding to 121457 its reverse (754121), we get a palindrome (875578).

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.

It is a cyclic number.

It is not a de Polignac number, because 121457 - 22 = 121453 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121457.

It is not an unprimeable number, because it can be changed into a prime (121453) 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, 8669 + ... + 8682.

It is an arithmetic number, because the mean of its divisors is an integer number (34704).

2121457 is an apocalyptic number.

It is an amenable number.

121457 is a deficient number, since it is larger than the sum of its proper divisors (17359).

121457 is an equidigital number, since it uses as much as digits as its factorization.

121457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17358.

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

The square root of 121457 is about 348.5068148545. The cubic root of 121457 is about 49.5230651275.

The spelling of 121457 in words is "one hundred twenty-one thousand, four hundred fifty-seven".

Divisors: 1 7 17351 121457