145402689 has 8 divisors (see below), whose sum is σ = 193940992. Its totient is φ = 96899760.

The previous prime is 145402669. The next prime is 145402703. The reversal of 145402689 is 986204541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-145402689 is a prime.

It is a super-2 number, since 2×145402689² = 42283883936861442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145402639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3027 + ... + 17319.

It is an arithmetic number, because the mean of its divisors is an integer number (24242624).

Almost surely, 2^145402689 is an apocalyptic number.

It is an amenable number.

145402689 is a deficient number, since it is larger than the sum of its proper divisors (48538303).

145402689 is a wasteful number, since it uses less digits than its factorization.

145402689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17687.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 145402689 is about 12058.3037364299. The cubic root of 145402689 is about 525.8446738334.

The spelling of 145402689 in words is "one hundred forty-five million, four hundred two thousand, six hundred eighty-nine".