1257152452155 has 24 divisors (see below), whose sum is σ = 2182283009712. Its totient is φ = 669490920384.

The previous prime is 1257152452133. The next prime is 1257152452159. The reversal of 1257152452155 is 5512542517521.

1257152452155 is a `hidden beast` number, since 1 + 2 + 5 + 71 + 5 + 2 + 4 + 521 + 55 = 666.

It is not a de Polignac number, because 1257152452155 - 2¹⁰ = 1257152451131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1257152452155.

It is not an unprimeable number, because it can be changed into a prime (1257152452159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20602269 + ... + 20663198.

It is an arithmetic number, because the mean of its divisors is an integer number (90928458738).

Almost surely, 2^{1257152452155} is an apocalyptic number.

1257152452155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1257152452155 is a deficient number, since it is larger than the sum of its proper divisors (925130557557).

1257152452155 is a wasteful number, since it uses less digits than its factorization.

1257152452155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41266155 (or 41266152 counting only the distinct ones).

The product of its digits is 700000, while the sum is 45.

Adding to 1257152452155 its reverse (5512542517521), we get a palindrome (6769694969676).

The spelling of 1257152452155 in words is "one trillion, two hundred fifty-seven billion, one hundred fifty-two million, four hundred fifty-two thousand, one hundred fifty-five".