245551401 has 6 divisors (see below), whose sum is σ = 354685370. Its totient is φ = 163700928.

The previous prime is 245551393. The next prime is 245551409. The reversal of 245551401 is 104155542.

It is an interprime number because it is at equal distance from previous prime (245551393) and next prime (245551409).

It can be written as a sum of positive squares in only one way, i.e., 185504400 + 60047001 = 13620^2 + 7749^2 .

It is not a de Polignac number, because 245551401 - 2³ = 245551393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245551409) 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 5 ways as a sum of consecutive naturals, for example, 13641736 + ... + 13641753.

Almost surely, 2^245551401 is an apocalyptic number.

It is an amenable number.

245551401 is a deficient number, since it is larger than the sum of its proper divisors (109133969).

245551401 is a wasteful number, since it uses less digits than its factorization.

245551401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27283495 (or 27283492 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 245551401 is about 15670.0798019665. The cubic root of 245551401 is about 626.2015507477.

The spelling of 245551401 in words is "two hundred forty-five million, five hundred fifty-one thousand, four hundred one".