625001601 has 16 divisors (see below), whose sum is σ = 953214848. Its totient is φ = 356832000.

The previous prime is 625001567. The next prime is 625001621. The reversal of 625001601 is 106100526.

It is a happy number.

It is not a de Polignac number, because 625001601 - 2⁷ = 625001473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625001621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12831 + ... + 37611.

It is an arithmetic number, because the mean of its divisors is an integer number (59575928).

Almost surely, 2^625001601 is an apocalyptic number.

It is an amenable number.

625001601 is a deficient number, since it is larger than the sum of its proper divisors (328213247).

625001601 is a wasteful number, since it uses less digits than its factorization.

625001601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25992.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 625001601 is about 25000.0320199795. The cubic root of 625001601 is about 854.9887033835.

The spelling of 625001601 in words is "six hundred twenty-five million, one thousand, six hundred one".