145537394 has 8 divisors (see below), whose sum is σ = 219512748. Its totient is φ = 72366480.

The previous prime is 145537387. The next prime is 145537409. The reversal of 145537394 is 493735541.

145537394 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 145323025 + 214369 = 12055^2 + 463^2 .

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

It is a super-2 number, since 2×145537394² = 42362266104622472, which contains 22 as substring.

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, 200657 + ... + 201380.

Almost surely, 2^145537394 is an apocalyptic number.

145537394 is a deficient number, since it is larger than the sum of its proper divisors (73975354).

145537394 is a wasteful number, since it uses less digits than its factorization.

145537394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402220.

The product of its digits is 226800, while the sum is 41.

The square root of 145537394 is about 12063.8880134060. Note that the first 3 decimals coincide. The cubic root of 145537394 is about 526.0070093087.

The spelling of 145537394 in words is "one hundred forty-five million, five hundred thirty-seven thousand, three hundred ninety-four".