145624442 has 8 divisors (see below), whose sum is σ = 219209376. Its totient is φ = 72554652.

The previous prime is 145624429. The next prime is 145624459. The reversal of 145624442 is 244426541.

145624442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×145624442² = 42412956215622728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145624399 and 145624408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128078 + ... + 129209.

It is an arithmetic number, because the mean of its divisors is an integer number (27401172).

Almost surely, 2^145624442 is an apocalyptic number.

145624442 is a deficient number, since it is larger than the sum of its proper divisors (73584934).

145624442 is a wasteful number, since it uses less digits than its factorization.

145624442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257572.

The product of its digits is 30720, while the sum is 32.

The square root of 145624442 is about 12067.4952662100. The cubic root of 145624442 is about 526.1118591830. Note that the first 3 decimals are identical.

The spelling of 145624442 in words is "one hundred forty-five million, six hundred twenty-four thousand, four hundred forty-two".