145621238 has 24 divisors (see below), whose sum is σ = 262861200. Its totient is φ = 60255888.

The previous prime is 145621237. The next prime is 145621249. The reversal of 145621238 is 832126541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145621237) 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, 22778 + ... + 28461.

It is an arithmetic number, because the mean of its divisors is an integer number (10952550).

Almost surely, 2^145621238 is an apocalyptic number.

145621238 is a deficient number, since it is larger than the sum of its proper divisors (117239962).

145621238 is a wasteful number, since it uses less digits than its factorization.

145621238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51284 (or 51277 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 145621238 is about 12067.3625121648. The cubic root of 145621238 is about 526.1080006852.

Adding to 145621238 its reverse (832126541), we get a palindrome (977747779).

The spelling of 145621238 in words is "one hundred forty-five million, six hundred twenty-one thousand, two hundred thirty-eight".