1374641261 has 4 divisors (see below), whose sum is σ = 1571018592. Its totient is φ = 1178263932.

The previous prime is 1374641249. The next prime is 1374641273. The reversal of 1374641261 is 1621464731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1374641249) and next prime (1374641273).

It is a cyclic number.

It is not a de Polignac number, because 1374641261 - 2⁶ = 1374641197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1374641221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98188655 + ... + 98188668.

It is an arithmetic number, because the mean of its divisors is an integer number (392754648).

Almost surely, 2^1374641261 is an apocalyptic number.

It is an amenable number.

1374641261 is a deficient number, since it is larger than the sum of its proper divisors (196377331).

1374641261 is an equidigital number, since it uses as much as digits as its factorization.

1374641261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196377330.

The product of its digits is 24192, while the sum is 35.

The square root of 1374641261 is about 37076.1548842379. The cubic root of 1374641261 is about 1111.8933304012.

The spelling of 1374641261 in words is "one billion, three hundred seventy-four million, six hundred forty-one thousand, two hundred sixty-one".