1213457 has 8 divisors (see below), whose sum is σ = 1447296. Its totient is φ = 994752.

The previous prime is 1213451. The next prime is 1213469. The reversal of 1213457 is 7543121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213457 - 2¹⁰ = 1212433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3608 + ... + 3929.

It is an arithmetic number, because the mean of its divisors is an integer number (180912).

2^1213457 is an apocalyptic number.

It is an amenable number.

1213457 is a deficient number, since it is larger than the sum of its proper divisors (233839).

1213457 is an equidigital number, since it uses as much as digits as its factorization.

1213457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567.

The product of its digits is 840, while the sum is 23.

The square root of 1213457 is about 1101.5702428806. The cubic root of 1213457 is about 106.6616089182.

Adding to 1213457 its reverse (7543121), we get a palindrome (8756578).

The spelling of 1213457 in words is "one million, two hundred thirteen thousand, four hundred fifty-seven".