72027545 has 4 divisors (see below), whose sum is σ = 86433060. Its totient is φ = 57622032.

The previous prime is 72027541. The next prime is 72027551. The reversal of 72027545 is 54572027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54572027 = 127 ⋅429701.

It can be written as a sum of positive squares in 2 ways, for example, as 10137856 + 61889689 = 3184^2 + 7867^2 .

It is a cyclic number.

It is not a de Polignac number, because 72027545 - 2² = 72027541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72027541) 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, 7202750 + ... + 7202759.

It is an arithmetic number, because the mean of its divisors is an integer number (21608265).

Almost surely, 2^72027545 is an apocalyptic number.

It is an amenable number.

72027545 is a deficient number, since it is larger than the sum of its proper divisors (14405515).

72027545 is a wasteful number, since it uses less digits than its factorization.

72027545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14405514.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 72027545 is about 8486.9043237213. The cubic root of 72027545 is about 416.0698096140.

The spelling of 72027545 in words is "seventy-two million, twenty-seven thousand, five hundred forty-five".