145021097 has 6 divisors (see below), whose sum is σ = 157034862. Its totient is φ = 133865472.

The previous prime is 145021081. The next prime is 145021099. The reversal of 145021097 is 790120541.

It can be written as a sum of positive squares in 3 ways, for example, as 3625216 + 141395881 = 1904^2 + 11891^2 .

It is not a de Polignac number, because 145021097 - 2⁴ = 145021081 is a prime.

It is a super-2 number, since 2×145021097² = 42062237150166818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145021099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 428888 + ... + 429225.

It is an arithmetic number, because the mean of its divisors is an integer number (26172477).

Almost surely, 2^145021097 is an apocalyptic number.

It is an amenable number.

145021097 is a deficient number, since it is larger than the sum of its proper divisors (12013765).

145021097 is an equidigital number, since it uses as much as digits as its factorization.

145021097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858139 (or 858126 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 145021097 is about 12042.4705521749. The cubic root of 145021097 is about 525.3842653110.

The spelling of 145021097 in words is "one hundred forty-five million, twenty-one thousand, ninety-seven".