146143902421 has 4 divisors (see below), whose sum is σ = 159429711744. Its totient is φ = 132858093100.

The previous prime is 146143902407. The next prime is 146143902427. The reversal of 146143902421 is 124209341641.

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 146143902421 - 2¹³ = 146143894229 is a prime.

It is a super-2 number, since 2×146143902421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146143902427) 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, 6642904645 + ... + 6642904666.

It is an arithmetic number, because the mean of its divisors is an integer number (39857427936).

Almost surely, 2^146143902421 is an apocalyptic number.

146143902421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146143902421 is a deficient number, since it is larger than the sum of its proper divisors (13285809323).

146143902421 is a wasteful number, since it uses less digits than its factorization.

146143902421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13285809322.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 146143902421 in words is "one hundred forty-six billion, one hundred forty-three million, nine hundred two thousand, four hundred twenty-one".