145424402 has 4 divisors (see below), whose sum is σ = 218136606. Its totient is φ = 72712200.

The previous prime is 145424399. The next prime is 145424407. The reversal of 145424402 is 204424541.

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

It can be written as a sum of positive squares in only one way, i.e., 78659161 + 66765241 = 8869^2 + 8171^2 .

It is a super-2 number, since 2×145424402² = 42296513394115208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145424407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36356099 + ... + 36356102.

Almost surely, 2^145424402 is an apocalyptic number.

145424402 is a deficient number, since it is larger than the sum of its proper divisors (72712204).

145424402 is an equidigital number, since it uses as much as digits as its factorization.

145424402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72712203.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 145424402 is about 12059.2040367513. The cubic root of 145424402 is about 525.8708473455.

Adding to 145424402 its reverse (204424541), we get a palindrome (349848943).

The spelling of 145424402 in words is "one hundred forty-five million, four hundred twenty-four thousand, four hundred two".