1651201025 has 12 divisors (see below), whose sum is σ = 2067764604. Its totient is φ = 1307880000.

The previous prime is 1651201001. The next prime is 1651201031. The reversal of 1651201025 is 5201021561.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 15241216 + 1635959809 = 3904^2 + 40447^2 .

It is not a de Polignac number, because 1651201025 - 2¹⁸ = 1650938881 is a prime.

It is a super-2 number, since 2×1651201025² = 5452929649922101250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324446 + ... + 329495.

It is an arithmetic number, because the mean of its divisors is an integer number (172313717).

Almost surely, 2^1651201025 is an apocalyptic number.

It is an amenable number.

1651201025 is a deficient number, since it is larger than the sum of its proper divisors (416563579).

1651201025 is a wasteful number, since it uses less digits than its factorization.

1651201025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654052 (or 654047 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1651201025 is about 40634.9729297314. The cubic root of 1651201025 is about 1181.9523900437.

Adding to 1651201025 its reverse (5201021561), we get a palindrome (6852222586).

The spelling of 1651201025 in words is "one billion, six hundred fifty-one million, two hundred one thousand, twenty-five".