1356624481 has 4 divisors (see below), whose sum is σ = 1375208452. Its totient is φ = 1338040512.

The previous prime is 1356624469. The next prime is 1356624547. The reversal of 1356624481 is 1844266531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255712081 + 1100912400 = 15991^2 + 33180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356624481 - 2¹¹ = 1356622433 is a prime.

It is a super-2 number, since 2×1356624481² = 3680859964897038722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356624421) 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, 9291876 + ... + 9292021.

It is an arithmetic number, because the mean of its divisors is an integer number (343802113).

Almost surely, 2^1356624481 is an apocalyptic number.

It is an amenable number.

1356624481 is a deficient number, since it is larger than the sum of its proper divisors (18583971).

1356624481 is an equidigital number, since it uses as much as digits as its factorization.

1356624481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18583970.

The product of its digits is 138240, while the sum is 40.

The square root of 1356624481 is about 36832.3835910738. The cubic root of 1356624481 is about 1107.0142634317.

The spelling of 1356624481 in words is "one billion, three hundred fifty-six million, six hundred twenty-four thousand, four hundred eighty-one".