1261406434 has 32 divisors (see below), whose sum is σ = 2029691520. Its totient is φ = 586608000.

The previous prime is 1261406431. The next prime is 1261406437. The reversal of 1261406434 is 4346041621.

It is an interprime number because it is at equal distance from previous prime (1261406431) and next prime (1261406437).

It is a super-2 number, since 2×1261406434² = 3182292383473192712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1261406396 and 1261406405.

It is not an unprimeable number, because it can be changed into a prime (1261406431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247209 + ... + 252259.

It is an arithmetic number, because the mean of its divisors is an integer number (63427860).

Almost surely, 2^1261406434 is an apocalyptic number.

1261406434 is a deficient number, since it is larger than the sum of its proper divisors (768285086).

1261406434 is a wasteful number, since it uses less digits than its factorization.

1261406434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1261406434 is about 35516.2840680159. The cubic root of 1261406434 is about 1080.4840177302.

The spelling of 1261406434 in words is "one billion, two hundred sixty-one million, four hundred six thousand, four hundred thirty-four".