1345143646 has 64 divisors (see below), whose sum is σ = 2659392000. Its totient is φ = 494363520.

The previous prime is 1345143643. The next prime is 1345143671. The reversal of 1345143646 is 6463415431.

It is a super-2 number, since 2×1345143646² = 3618822856748346632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345143643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786240 + ... + 787948.

It is an arithmetic number, because the mean of its divisors is an integer number (41553000).

Almost surely, 2^1345143646 is an apocalyptic number.

1345143646 is a deficient number, since it is larger than the sum of its proper divisors (1314248354).

1345143646 is a wasteful number, since it uses less digits than its factorization.

1345143646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its digits is 103680, while the sum is 37.

The square root of 1345143646 is about 36676.1999940016. The cubic root of 1345143646 is about 1103.8826009159.

It can be divided in two parts, 1345 and 143646, that added together give a triangular number (144991 = T₅₃₈).

The spelling of 1345143646 in words is "one billion, three hundred forty-five million, one hundred forty-three thousand, six hundred forty-six".