1421507823 has 8 divisors (see below), whose sum is σ = 1903694208. Its totient is φ = 943496664.

The previous prime is 1421507807. The next prime is 1421507831. The reversal of 1421507823 is 3287051241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421507823 - 2⁴ = 1421507807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421507833) 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, 1043011 + ... + 1044372.

It is an arithmetic number, because the mean of its divisors is an integer number (237961776).

Almost surely, 2^1421507823 is an apocalyptic number.

1421507823 is a deficient number, since it is larger than the sum of its proper divisors (482186385).

1421507823 is a wasteful number, since it uses less digits than its factorization.

1421507823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087613.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1421507823 is about 37702.8887885265. Note that the first 3 decimals coincide. The cubic root of 1421507823 is about 1124.3885593949.

The spelling of 1421507823 in words is "one billion, four hundred twenty-one million, five hundred seven thousand, eight hundred twenty-three".