1261351 has 16 divisors (see below), whose sum is σ = 1580544. Its totient is φ = 980064.

The previous prime is 1261333. The next prime is 1261357. The reversal of 1261351 is 1531621.

1261351 = T₄₃₄ + T₄₃₅ + ... + T₄₄₆.

1261351 = 456² + 457² + ... + 461².

It is not a de Polignac number, because 1261351 - 2⁷ = 1261223 is a prime.

It is a super-3 number, since 3×1261351³ = 6020452333576879653, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7470 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (98784).

2^1261351 is an apocalyptic number.

1261351 is a deficient number, since it is larger than the sum of its proper divisors (319193).

1261351 is a wasteful number, since it uses less digits than its factorization.

1261351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 180, while the sum is 19.

The square root of 1261351 is about 1123.0988380370. The cubic root of 1261351 is about 108.0468189782.

Adding to 1261351 its reverse (1531621), we get a palindrome (2792972).

The spelling of 1261351 in words is "one million, two hundred sixty-one thousand, three hundred fifty-one".