1350842581 has 4 divisors (see below), whose sum is σ = 1473646464. Its totient is φ = 1228038700.

The previous prime is 1350842573. The next prime is 1350842587. The reversal of 1350842581 is 1852480531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1350842581 - 2³ = 1350842573 is a prime.

It is a super-2 number, since 2×1350842581² = 3649551357285483122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1350842581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350842587) 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, 61401925 + ... + 61401946.

It is an arithmetic number, because the mean of its divisors is an integer number (368411616).

Almost surely, 2^1350842581 is an apocalyptic number.

1350842581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1350842581 is a deficient number, since it is larger than the sum of its proper divisors (122803883).

1350842581 is a wasteful number, since it uses less digits than its factorization.

1350842581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122803882.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 1350842581 is about 36753.8104283080. The cubic root of 1350842581 is about 1105.4393347312.

The spelling of 1350842581 in words is "one billion, three hundred fifty million, eight hundred forty-two thousand, five hundred eighty-one".