1617261025 has 12 divisors (see below), whose sum is σ = 2020045932. Its totient is φ = 1284362240.

The previous prime is 1617261011. The next prime is 1617261043. The reversal of 1617261025 is 5201627161.

It can be written as a sum of positive squares in 6 ways, for example, as 1140624 + 1616120401 = 1068^2 + 40201^2 .

It is not a de Polignac number, because 1617261025 - 2⁵ = 1617260993 is a prime.

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, 232672 + ... + 239521.

It is an arithmetic number, because the mean of its divisors is an integer number (168337161).

Almost surely, 2^1617261025 is an apocalyptic number.

It is an amenable number.

1617261025 is a deficient number, since it is larger than the sum of its proper divisors (402784907).

1617261025 is a wasteful number, since it uses less digits than its factorization.

1617261025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472340 (or 472335 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1617261025 is about 40215.1840105202. The cubic root of 1617261025 is about 1173.7980223914.

Adding to 1617261025 its reverse (5201627161), we get a palindrome (6818888186).

The spelling of 1617261025 in words is "one billion, six hundred seventeen million, two hundred sixty-one thousand, twenty-five".