1216057 has 8 divisors (see below), whose sum is σ = 1324800. Its totient is φ = 1111824.

The previous prime is 1216043. The next prime is 1216067. The reversal of 1216057 is 7506121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216067) 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, 553 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (165600).

2^1216057 is an apocalyptic number.

It is an amenable number.

1216057 is a deficient number, since it is larger than the sum of its proper divisors (108743).

1216057 is a wasteful number, since it uses less digits than its factorization.

1216057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1216057 is about 1102.7497449558. The cubic root of 1216057 is about 106.7377336739.

Subtracting 1216057 from its reverse (7506121), we obtain a square (6290064 = 2508²).

The spelling of 1216057 in words is "one million, two hundred sixteen thousand, fifty-seven".