1342540221 has 32 divisors (see below), whose sum is σ = 1998259200. Its totient is φ = 794887680.

The previous prime is 1342540217. The next prime is 1342540223. The reversal of 1342540221 is 1220452431.

It is not a de Polignac number, because 1342540221 - 2² = 1342540217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1342540191 and 1342540200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342540223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323085 + ... + 327213.

It is an arithmetic number, because the mean of its divisors is an integer number (62445600).

Almost surely, 2^1342540221 is an apocalyptic number.

1342540221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1342540221 is a deficient number, since it is larger than the sum of its proper divisors (655718979).

1342540221 is a wasteful number, since it uses less digits than its factorization.

1342540221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1342540221 is about 36640.6907822437. The cubic root of 1342540221 is about 1103.1699802175.

Adding to 1342540221 its reverse (1220452431), we get a palindrome (2562992652).

The spelling of 1342540221 in words is "one billion, three hundred forty-two million, five hundred forty thousand, two hundred twenty-one".