1340221000 has 32 divisors (see below), whose sum is σ = 3136119480. Its totient is φ = 536088000.

The previous prime is 1340220991. The next prime is 1340221009. The reversal of 1340221000 is 1220431.

It is an interprime number because it is at equal distance from previous prime (1340220991) and next prime (1340221009).

It can be written as a sum of positive squares in 4 ways, for example, as 542610436 + 797610564 = 23294^2 + 28242^2 .

It is not an unprimeable number, because it can be changed into a prime (1340221009) 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, 669111 + ... + 671110.

Almost surely, 2^1340221000 is an apocalyptic number.

1340221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340221000 is an abundant number, since it is smaller than the sum of its proper divisors (1795898480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340221000 is a wasteful number, since it uses less digits than its factorization.

1340221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340242 (or 1340228 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1340221000 is about 36609.0289409594. The cubic root of 1340221000 is about 1102.5343767508.

Adding to 1340221000 its reverse (1220431), we get a palindrome (1341441431).

The spelling of 1340221000 in words is "one billion, three hundred forty million, two hundred twenty-one thousand".