145472122 has 4 divisors (see below), whose sum is σ = 218208186. Its totient is φ = 72736060.

The previous prime is 145472099. The next prime is 145472147. The reversal of 145472122 is 221274541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221274541 = 37 ⋅5980393.

It can be written as a sum of positive squares in only one way, i.e., 98426241 + 47045881 = 9921^2 + 6859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36368029 + ... + 36368032.

Almost surely, 2^145472122 is an apocalyptic number.

145472122 is a deficient number, since it is larger than the sum of its proper divisors (72736064).

145472122 is an equidigital number, since it uses as much as digits as its factorization.

145472122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72736063.

The product of its digits is 4480, while the sum is 28.

The square root of 145472122 is about 12061.1824461783. The cubic root of 145472122 is about 525.9283613347.

The spelling of 145472122 in words is "one hundred forty-five million, four hundred seventy-two thousand, one hundred twenty-two".