1261454164 has 12 divisors (see below), whose sum is σ = 2212156800. Its totient is φ = 629409368.

The previous prime is 1261454087. The next prime is 1261454167. The reversal of 1261454164 is 4614541621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261454167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327274 + ... + 331105.

It is an arithmetic number, because the mean of its divisors is an integer number (184346400).

Almost surely, 2^1261454164 is an apocalyptic number.

It is an amenable number.

1261454164 is a deficient number, since it is larger than the sum of its proper divisors (950702636).

1261454164 is a wasteful number, since it uses less digits than its factorization.

1261454164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658862 (or 658860 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 1261454164 is about 35516.9560069553. The cubic root of 1261454164 is about 1080.4976456010.

Adding to 1261454164 its reverse (4614541621), we get a palindrome (5875995785).

The spelling of 1261454164 in words is "one billion, two hundred sixty-one million, four hundred fifty-four thousand, one hundred sixty-four".