1645201254 has 32 divisors (see below), whose sum is σ = 3366567936. Its totient is φ = 535749120.

The previous prime is 1645201237. The next prime is 1645201277. The reversal of 1645201254 is 4521025461.

1645201254 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157659 + ... + 167769.

It is an arithmetic number, because the mean of its divisors is an integer number (105205248).

Almost surely, 2^1645201254 is an apocalyptic number.

1645201254 is an abundant number, since it is smaller than the sum of its proper divisors (1721366682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645201254 is a wasteful number, since it uses less digits than its factorization.

1645201254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1645201254 is about 40561.0805329444. The cubic root of 1645201254 is about 1180.5190797733.

The spelling of 1645201254 in words is "one billion, six hundred forty-five million, two hundred one thousand, two hundred fifty-four".