1051261155 has 48 divisors (see below), whose sum is σ = 2113622784. Its totient is φ = 473394240.

The previous prime is 1051261139. The next prime is 1051261163. The reversal of 1051261155 is 5511621501.

It is not a de Polignac number, because 1051261155 - 2⁴ = 1051261139 is a prime.

It is a super-2 number, since 2×1051261155² = 2210300032023868050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3801 + ... + 46010.

It is an arithmetic number, because the mean of its divisors is an integer number (44033808).

Almost surely, 2^1051261155 is an apocalyptic number.

1051261155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1051261155 is an abundant number, since it is smaller than the sum of its proper divisors (1062361629).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051261155 is a wasteful number, since it uses less digits than its factorization.

1051261155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49896 (or 49893 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 1051261155 is about 32423.1576963133. The cubic root of 1051261155 is about 1016.8031252232.

Adding to 1051261155 its reverse (5511621501), we get a palindrome (6562882656).

The spelling of 1051261155 in words is "one billion, fifty-one million, two hundred sixty-one thousand, one hundred fifty-five".