145561279 has 2 divisors, whose sum is σ = 145561280. Its totient is φ = 145561278.

The previous prime is 145561231. The next prime is 145561307. The reversal of 145561279 is 972165541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145561279 - 2¹¹ = 145559231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145561379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72780639 + 72780640.

It is an arithmetic number, because the mean of its divisors is an integer number (72780640).

Almost surely, 2^145561279 is an apocalyptic number.

145561279 is a deficient number, since it is larger than the sum of its proper divisors (1).

145561279 is an equidigital number, since it uses as much as digits as its factorization.

145561279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 40.

The square root of 145561279 is about 12064.8779106960. The cubic root of 145561279 is about 526.0357831054.

The spelling of 145561279 in words is "one hundred forty-five million, five hundred sixty-one thousand, two hundred seventy-nine".