145274689 has 4 divisors (see below), whose sum is σ = 166028224. Its totient is φ = 124521156.

The previous prime is 145274671. The next prime is 145274713. The reversal of 145274689 is 986472541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986472541 = 61 ⋅16171681.

It is a cyclic number.

It is not a de Polignac number, because 145274689 - 2⁹ = 145274177 is a prime.

It is a super-2 number, since 2×145274689² = 42209470528093442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145274629) 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, 10376757 + ... + 10376770.

It is an arithmetic number, because the mean of its divisors is an integer number (41507056).

Almost surely, 2^145274689 is an apocalyptic number.

It is an amenable number.

145274689 is a deficient number, since it is larger than the sum of its proper divisors (20753535).

145274689 is an equidigital number, since it uses as much as digits as its factorization.

145274689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20753534.

The product of its digits is 483840, while the sum is 46.

The square root of 145274689 is about 12052.9950219852. The cubic root of 145274689 is about 525.6903257510.

The spelling of 145274689 in words is "one hundred forty-five million, two hundred seventy-four thousand, six hundred eighty-nine".