1025040155 has 16 divisors (see below), whose sum is σ = 1263790080. Its totient is φ = 797748192.

The previous prime is 1025040127. The next prime is 1025040167. The reversal of 1025040155 is 5510405201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1025040155 - 2¹⁰ = 1025039131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1025040155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26186 + ... + 52304.

It is an arithmetic number, because the mean of its divisors is an integer number (78986880).

Almost surely, 2^1025040155 is an apocalyptic number.

1025040155 is a deficient number, since it is larger than the sum of its proper divisors (238749925).

1025040155 is a wasteful number, since it uses less digits than its factorization.

1025040155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26338.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1025040155 is about 32016.2482967633. The cubic root of 1025040155 is about 1008.2780039004.

Adding to 1025040155 its reverse (5510405201), we get a palindrome (6535445356).

It can be divided in two parts, 10250 and 40155, that added together give a palindrome (50405).

The spelling of 1025040155 in words is "one billion, twenty-five million, forty thousand, one hundred fifty-five".