1025555381 has 16 divisors (see below), whose sum is σ = 1110888960. Its totient is φ = 943462080.

The previous prime is 1025555371. The next prime is 1025555383. The reversal of 1025555381 is 1835555201.

It is a cyclic number.

It is not a de Polignac number, because 1025555381 - 2⁶ = 1025555317 is a prime.

It is a super-2 number, since 2×1025555381² = 2103527678996110322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025555383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463580 + ... + 465786.

It is an arithmetic number, because the mean of its divisors is an integer number (69430560).

Almost surely, 2^1025555381 is an apocalyptic number.

It is an amenable number.

1025555381 is a deficient number, since it is larger than the sum of its proper divisors (85333579).

1025555381 is a wasteful number, since it uses less digits than its factorization.

1025555381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 1025555381 is about 32024.2936065731. The cubic root of 1025555381 is about 1008.4469091625.

The spelling of 1025555381 in words is "one billion, twenty-five million, five hundred fifty-five thousand, three hundred eighty-one".