1353981 has 16 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 856128.

The previous prime is 1353977. The next prime is 1353983. The reversal of 1353981 is 1893531.

It is a happy number.

It is not a de Polignac number, because 1353981 - 2² = 1353977 is a prime.

It is a super-2 number, since 2×1353981² = 3666529096722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6775 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^1353981 is an apocalyptic number.

It is an amenable number.

1353981 is a deficient number, since it is larger than the sum of its proper divisors (546819).

1353981 is a wasteful number, since it uses less digits than its factorization.

1353981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308.

The product of its digits is 3240, while the sum is 30.

The square root of 1353981 is about 1163.6068923825. The cubic root of 1353981 is about 110.6294763422.

The spelling of 1353981 in words is "one million, three hundred fifty-three thousand, nine hundred eighty-one".