145721607 has 32 divisors (see below), whose sum is σ = 210677760. Its totient is φ = 89376000.

The previous prime is 145721599. The next prime is 145721617. The reversal of 145721607 is 706127541.

It is not a de Polignac number, because 145721607 - 2³ = 145721599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145721617) 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 31 ways as a sum of consecutive naturals, for example, 191107 + ... + 191867.

It is an arithmetic number, because the mean of its divisors is an integer number (6583680).

Almost surely, 2^145721607 is an apocalyptic number.

145721607 is a deficient number, since it is larger than the sum of its proper divisors (64956153).

145721607 is a wasteful number, since it uses less digits than its factorization.

145721607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 145721607 is about 12071.5204924649. The cubic root of 145721607 is about 526.2288457107.

The spelling of 145721607 in words is "one hundred forty-five million, seven hundred twenty-one thousand, six hundred seven".