1198357143025 has 27 divisors (see below), whose sum is σ = 1728624306369. Its totient is φ = 821704339680.

The previous prime is 1198357142993. The next prime is 1198357143029. The reversal of 1198357143025 is 5203417538911.

The square root of 1198357143025 is 1094695.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4425043441 + 1193932099584 = 66521^2 + 1092672^2 .

It is not a de Polignac number, because 1198357143025 - 2⁵ = 1198357142993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198357143025.

It is not an unprimeable number, because it can be changed into a prime (1198357143029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38298687 + ... + 38329963.

Almost surely, 2^{1198357143025} is an apocalyptic number.

1198357143025 is the 1094695-th square number.

1198357143025 is the 547348-th centered octagonal number.

It is an amenable number.

1198357143025 is a deficient number, since it is larger than the sum of its proper divisors (530267163344).

1198357143025 is an frugal number, since it uses more digits than its factorization.

1198357143025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62578 (or 31289 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

Multiplying 1198357143025 by its sum of digits (49), we get a square (58719500008225 = 7662865²).

1198357143025 divided by its sum of digits (49) gives a square (24456268225 = 156385²).

The spelling of 1198357143025 in words is "one trillion, one hundred ninety-eight billion, three hundred fifty-seven million, one hundred forty-three thousand, twenty-five".