145366121 has 4 divisors (see below), whose sum is σ = 148108932. Its totient is φ = 142623312.

The previous prime is 145366097. The next prime is 145366127. The reversal of 145366121 is 121663541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83978896 + 61387225 = 9164^2 + 7835^2 .

It is a cyclic number.

It is not a de Polignac number, because 145366121 - 2⁶ = 145366057 is a prime.

It is a super-2 number, since 2×145366121² = 42262618269173282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145366127) 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, 1371326 + ... + 1371431.

It is an arithmetic number, because the mean of its divisors is an integer number (37027233).

Almost surely, 2^145366121 is an apocalyptic number.

It is an amenable number.

145366121 is a deficient number, since it is larger than the sum of its proper divisors (2742811).

145366121 is an equidigital number, since it uses as much as digits as its factorization.

145366121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742810.

The product of its digits is 4320, while the sum is 29.

The square root of 145366121 is about 12056.7873415765. The cubic root of 145366121 is about 525.8005877614.

The spelling of 145366121 in words is "one hundred forty-five million, three hundred sixty-six thousand, one hundred twenty-one".