1025700261 has 4 divisors (see below), whose sum is σ = 1367600352. Its totient is φ = 683800172.

The previous prime is 1025700259. The next prime is 1025700271. The reversal of 1025700261 is 1620075201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1620075201 = 3 ⋅540025067.

It is a cyclic number.

It is not a de Polignac number, because 1025700261 - 2¹ = 1025700259 is a prime.

It is a super-2 number, since 2×1025700261² = 2104122050830936242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025700211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170950041 + ... + 170950046.

It is an arithmetic number, because the mean of its divisors is an integer number (341900088).

Almost surely, 2^1025700261 is an apocalyptic number.

It is an amenable number.

1025700261 is a deficient number, since it is larger than the sum of its proper divisors (341900091).

1025700261 is an equidigital number, since it uses as much as digits as its factorization.

1025700261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341900090.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1025700261 is about 32026.5555594104. Note that the first 5 decimals coincide. The cubic root of 1025700261 is about 1008.4943946230.

Adding to 1025700261 its reverse (1620075201), we get a palindrome (2645775462).

The spelling of 1025700261 in words is "one billion, twenty-five million, seven hundred thousand, two hundred sixty-one".