121961394 has 12 divisors (see below), whose sum is σ = 264249726. Its totient is φ = 40653792.

The previous prime is 121961377. The next prime is 121961401. The reversal of 121961394 is 493169121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 50339025 = 8463^2 + 7095^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3387799 + ... + 3387834.

Almost surely, 2^121961394 is an apocalyptic number.

121961394 is an abundant number, since it is smaller than the sum of its proper divisors (142288332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121961394 is a wasteful number, since it uses less digits than its factorization.

121961394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775641 (or 6775638 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 121961394 is about 11043.6132674048. The cubic root of 121961394 is about 495.9152457725.

The spelling of 121961394 in words is "one hundred twenty-one million, nine hundred sixty-one thousand, three hundred ninety-four".