1421340137 has 4 divisors (see below), whose sum is σ = 1624388736. Its totient is φ = 1218291540.

The previous prime is 1421340121. The next prime is 1421340143. The reversal of 1421340137 is 7310431241.

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 1421340137 - 2⁴ = 1421340121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421340197) 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, 101524289 + ... + 101524302.

It is an arithmetic number, because the mean of its divisors is an integer number (406097184).

Almost surely, 2^1421340137 is an apocalyptic number.

It is an amenable number.

1421340137 is a deficient number, since it is larger than the sum of its proper divisors (203048599).

1421340137 is an equidigital number, since it uses as much as digits as its factorization.

1421340137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203048598.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1421340137 is about 37700.6649410856. The cubic root of 1421340137 is about 1124.3443453964.

Adding to 1421340137 its reverse (7310431241), we get a palindrome (8731771378).

The spelling of 1421340137 in words is "one billion, four hundred twenty-one million, three hundred forty thousand, one hundred thirty-seven".