1421589851 has 4 divisors (see below), whose sum is σ = 1550825304. Its totient is φ = 1292354400.

The previous prime is 1421589749. The next prime is 1421589857. The reversal of 1421589851 is 1589851241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421589851 - 2¹⁴ = 1421573467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421589857) 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, 64617710 + ... + 64617731.

It is an arithmetic number, because the mean of its divisors is an integer number (387706326).

Almost surely, 2^1421589851 is an apocalyptic number.

1421589851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421589851 is a deficient number, since it is larger than the sum of its proper divisors (129235453).

1421589851 is a wasteful number, since it uses less digits than its factorization.

1421589851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129235452.

The product of its digits is 115200, while the sum is 44.

The square root of 1421589851 is about 37703.9765939881. The cubic root of 1421589851 is about 1124.4101865641.

The spelling of 1421589851 in words is "one billion, four hundred twenty-one million, five hundred eighty-nine thousand, eight hundred fifty-one".