1421958209 has 16 divisors (see below), whose sum is σ = 1657766400. Its totient is φ = 1194609312.

The previous prime is 1421958199. The next prime is 1421958283. The reversal of 1421958209 is 9028591241.

It is not a de Polignac number, because 1421958209 - 2¹² = 1421954113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421958299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10379189 + ... + 10379325.

It is an arithmetic number, because the mean of its divisors is an integer number (103610400).

Almost surely, 2^1421958209 is an apocalyptic number.

It is an amenable number.

1421958209 is a deficient number, since it is larger than the sum of its proper divisors (235808191).

1421958209 is an frugal number, since it uses more digits than its factorization.

1421958209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1421958209 is about 37708.8611469506. The cubic root of 1421958209 is about 1124.5072960828.

The spelling of 1421958209 in words is "one billion, four hundred twenty-one million, nine hundred fifty-eight thousand, two hundred nine".