146821442 has 4 divisors (see below), whose sum is σ = 220232166. Its totient is φ = 73410720.

The previous prime is 146821427. The next prime is 146821457. The reversal of 146821442 is 244128641.

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

It is an interprime number because it is at equal distance from previous prime (146821427) and next prime (146821457).

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 2076481 = 12031^2 + 1441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 146821399 and 146821408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36705359 + ... + 36705362.

Almost surely, 2^146821442 is an apocalyptic number.

146821442 is a deficient number, since it is larger than the sum of its proper divisors (73410724).

146821442 is an equidigital number, since it uses as much as digits as its factorization.

146821442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73410723.

The product of its digits is 12288, while the sum is 32.

The square root of 146821442 is about 12116.9898077039. The cubic root of 146821442 is about 527.5494343585.

The spelling of 146821442 in words is "one hundred forty-six million, eight hundred twenty-one thousand, four hundred forty-two".