147722401 has 4 divisors (see below), whose sum is σ = 156411972. Its totient is φ = 139032832.

The previous prime is 147722383. The next prime is 147722423. The reversal of 147722401 is 104227741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104227741 = 1153 ⋅90397.

It can be written as a sum of positive squares in 2 ways, for example, as 123210000 + 24512401 = 11100^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 147722401 - 2⁵ = 147722369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147722401.

It is not an unprimeable number, because it can be changed into a prime (147722101) 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, 4344760 + ... + 4344793.

It is an arithmetic number, because the mean of its divisors is an integer number (39102993).

Almost surely, 2^147722401 is an apocalyptic number.

It is an amenable number.

147722401 is a deficient number, since it is larger than the sum of its proper divisors (8689571).

147722401 is an equidigital number, since it uses as much as digits as its factorization.

147722401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689570.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 147722401 is about 12154.1104569606. The cubic root of 147722401 is about 528.6263240596.

The spelling of 147722401 in words is "one hundred forty-seven million, seven hundred twenty-two thousand, four hundred one".