146858921 has 12 divisors (see below), whose sum is σ = 161604144. Its totient is φ = 132355800.

The previous prime is 146858917. The next prime is 146858927. The reversal of 146858921 is 129858641.

It is not a de Polignac number, because 146858921 - 2² = 146858917 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146858927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212186 + ... + 212876.

It is an arithmetic number, because the mean of its divisors is an integer number (13467012).

Almost surely, 2^146858921 is an apocalyptic number.

146858921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146858921 is a deficient number, since it is larger than the sum of its proper divisors (14745223).

146858921 is an equidigital number, since it uses as much as digits as its factorization.

146858921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 841 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 146858921 is about 12118.5362564957. The cubic root of 146858921 is about 527.5943195896.

The spelling of 146858921 in words is "one hundred forty-six million, eight hundred fifty-eight thousand, nine hundred twenty-one".