145707409 has 8 divisors (see below), whose sum is σ = 158324480. Its totient is φ = 133585200.

The previous prime is 145707389. The next prime is 145707427. The reversal of 145707409 is 904707541.

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

It is not a de Polignac number, because 145707409 - 2¹¹ = 145705361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145707439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123102 + ... + 124279.

It is an arithmetic number, because the mean of its divisors is an integer number (19790560).

Almost surely, 2^145707409 is an apocalyptic number.

145707409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145707409 is a deficient number, since it is larger than the sum of its proper divisors (12617071).

145707409 is a wasteful number, since it uses less digits than its factorization.

145707409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247431.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 145707409 is about 12070.9323997776. The cubic root of 145707409 is about 526.2117545830.

The spelling of 145707409 in words is "one hundred forty-five million, seven hundred seven thousand, four hundred nine".