1261346402 has 4 divisors (see below), whose sum is σ = 1892019606. Its totient is φ = 630673200.

The previous prime is 1261346363. The next prime is 1261346413. The reversal of 1261346402 is 2046431621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1196398921 + 64947481 = 34589^2 + 8059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315336599 + ... + 315336602.

Almost surely, 2^1261346402 is an apocalyptic number.

1261346402 is a deficient number, since it is larger than the sum of its proper divisors (630673204).

1261346402 is an equidigital number, since it uses as much as digits as its factorization.

1261346402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630673203.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1261346402 is about 35515.4389245016. The cubic root of 1261346402 is about 1080.4668769040.

The spelling of 1261346402 in words is "one billion, two hundred sixty-one million, three hundred forty-six thousand, four hundred two".