1155420534 has 32 divisors (see below), whose sum is σ = 2384040960. Its totient is φ = 373034592.

The previous prime is 1155420529. The next prime is 1155420547. The reversal of 1155420534 is 4350245511.

It is a super-2 number, since 2×1155420534² = 2669993220777690312, which contains 22 as substring.

It is a congruent number.

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, 37837 + ... + 61175.

It is an arithmetic number, because the mean of its divisors is an integer number (74501280).

Almost surely, 2^1155420534 is an apocalyptic number.

1155420534 is an abundant number, since it is smaller than the sum of its proper divisors (1228620426).

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

1155420534 is a wasteful number, since it uses less digits than its factorization.

1155420534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1155420534 is about 33991.4773730122. The cubic root of 1155420534 is about 1049.3330712610. Note that the first 3 decimals are identical.

The spelling of 1155420534 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, five hundred thirty-four".