1200429131 has 4 divisors (see below), whose sum is σ = 1309559064. Its totient is φ = 1091299200.

The previous prime is 1200429091. The next prime is 1200429157. The reversal of 1200429131 is 1319240021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1319240021 = 11 ⋅119930911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200429131 is a prime.

It is a super-2 number, since 2×1200429131² = 2882060197106830322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1200429097 and 1200429106.

It is not an unprimeable number, because it can be changed into a prime (1200429331) 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, 54564950 + ... + 54564971.

It is an arithmetic number, because the mean of its divisors is an integer number (327389766).

Almost surely, 2^1200429131 is an apocalyptic number.

1200429131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200429131 is a deficient number, since it is larger than the sum of its proper divisors (109129933).

1200429131 is a wasteful number, since it uses less digits than its factorization.

1200429131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109129932.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1200429131 is about 34647.2095701804. The cubic root of 1200429131 is about 1062.7852262344.

Adding to 1200429131 its reverse (1319240021), we get a palindrome (2519669152).

The spelling of 1200429131 in words is "one billion, two hundred million, four hundred twenty-nine thousand, one hundred thirty-one".