1294187961 has 16 divisors (see below), whose sum is σ = 1933334208. Its totient is φ = 763156800.

The previous prime is 1294187957. The next prime is 1294187971. The reversal of 1294187961 is 1697814921.

It is not a de Polignac number, because 1294187961 - 2² = 1294187957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1294187961.

It is not an unprimeable number, because it can be changed into a prime (1294187971) 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, 528750 + ... + 531191.

It is an arithmetic number, because the mean of its divisors is an integer number (120833388).

Almost surely, 2^1294187961 is an apocalyptic number.

1294187961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1294187961 is a deficient number, since it is larger than the sum of its proper divisors (639146247).

1294187961 is a wasteful number, since it uses less digits than its factorization.

1294187961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059992.

The product of its digits is 217728, while the sum is 48.

The square root of 1294187961 is about 35974.8239884506. The cubic root of 1294187961 is about 1089.7639870009.

The spelling of 1294187961 in words is "one billion, two hundred ninety-four million, one hundred eighty-seven thousand, nine hundred sixty-one".