1356121 has 8 divisors (see below), whose sum is σ = 1481480. Its totient is φ = 1233792.

The previous prime is 1356109. The next prime is 1356133. The reversal of 1356121 is 1216531.

It is an interprime number because it is at equal distance from previous prime (1356109) and next prime (1356133).

It can be written as a sum of positive squares in 4 ways, for example, as 1225 + 1354896 = 35^2 + 1164^2 .

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 1356121 - 2⁹ = 1355609 is a prime.

1356121 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356101) 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, 235 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (185185).

2^1356121 is an apocalyptic number.

It is an amenable number.

1356121 is a deficient number, since it is larger than the sum of its proper divisors (125359).

1356121 is a wasteful number, since it uses less digits than its factorization.

1356121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515.

The product of its digits is 180, while the sum is 19.

The square root of 1356121 is about 1164.5260838642. The cubic root of 1356121 is about 110.6877298580.

The spelling of 1356121 in words is "one million, three hundred fifty-six thousand, one hundred twenty-one".