145623402 has 24 divisors (see below), whose sum is σ = 319066020. Its totient is φ = 47995200.

The previous prime is 145623389. The next prime is 145623421. The reversal of 145623402 is 204326541.

It can be written as a sum of positive squares in 2 ways, for example, as 126360081 + 19263321 = 11241^2 + 4389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43849 + ... + 47052.

Almost surely, 2^145623402 is an apocalyptic number.

145623402 is an abundant number, since it is smaller than the sum of its proper divisors (173442618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145623402 is a wasteful number, since it uses less digits than its factorization.

145623402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90998 (or 90995 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 145623402 is about 12067.4521751694. The cubic root of 145623402 is about 526.1106067429.

Adding to 145623402 its reverse (204326541), we get a palindrome (349949943).

The spelling of 145623402 in words is "one hundred forty-five million, six hundred twenty-three thousand, four hundred two".