145422287 has 4 divisors (see below), whose sum is σ = 145453560. Its totient is φ = 145391016.

The previous prime is 145422283. The next prime is 145422323. The reversal of 145422287 is 782224541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782224541 = 7 ⋅111746363.

It is a cyclic number.

It is not a de Polignac number, because 145422287 - 2² = 145422283 is a prime.

It is a super-2 number, since 2×145422287² = 42295283112620738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145422283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7112 + ... + 18477.

It is an arithmetic number, because the mean of its divisors is an integer number (36363390).

Almost surely, 2^145422287 is an apocalyptic number.

145422287 is a deficient number, since it is larger than the sum of its proper divisors (31273).

145422287 is an equidigital number, since it uses as much as digits as its factorization.

145422287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31272.

The product of its digits is 35840, while the sum is 35.

The square root of 145422287 is about 12059.1163440776. The cubic root of 145422287 is about 525.8682979745.

The spelling of 145422287 in words is "one hundred forty-five million, four hundred twenty-two thousand, two hundred eighty-seven".