145270121 has 2 divisors, whose sum is σ = 145270122.
Its totient is φ = 145270120.
The previous prime is 145270109. The next prime is 145270133. The reversal of 145270121 is 121072541.
It is a balanced prime because it is at equal distance from previous prime (145270109) and next prime (145270133).
It can be written as a sum of positive squares in only one way, i.e., 140754496 + 4515625 = 11864^2 + 2125^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-145270121 is a prime.
It is a super-2 number, since 2×1452701212 = 42206816110709282, which contains 22 as substring.
It is a Chen prime.
It is an alternating number because its digits alternate between odd and even.
It is not a weakly prime, because it can be changed into another prime (145270171) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72635060 + 72635061.
It is an arithmetic number, because the mean of its divisors is an integer number (72635061).
Almost surely, 2145270121 is an apocalyptic number.
It is an amenable number.
145270121 is a deficient number, since it is larger than the sum of its proper divisors (1).
145270121 is an equidigital number, since it uses as much as digits as its factorization.
145270121 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 560, while the sum is 23.
The square root of 145270121 is about 12052.8055240263.
The cubic root of 145270121 is about 525.6848157786.
The spelling of 145270121 in words is "one hundred forty-five million, two hundred seventy thousand, one hundred twenty-one".