146904881 has 4 divisors (see below), whose sum is σ = 146931492. Its totient is φ = 146878272.

The previous prime is 146904847. The next prime is 146904889. The reversal of 146904881 is 188409641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188409641 = 7 ⋅26915663.

It can be written as a sum of positive squares in 2 ways, for example, as 38328481 + 108576400 = 6191^2 + 10420^2 .

It is a cyclic number.

It is not a de Polignac number, because 146904881 - 2¹⁰ = 146903857 is a prime.

It is a super-2 number, since 2×146904881² = 43162088123248322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146904889) 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, 1580 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (36732873).

Almost surely, 2^146904881 is an apocalyptic number.

It is an amenable number.

146904881 is a deficient number, since it is larger than the sum of its proper divisors (26611).

146904881 is an equidigital number, since it uses as much as digits as its factorization.

146904881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26610.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 146904881 is about 12120.4323767760. The cubic root of 146904881 is about 527.6493513296.

The spelling of 146904881 in words is "one hundred forty-six million, nine hundred four thousand, eight hundred eighty-one".